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For the techno single by Moby, see Thousand (single).
1000 is the natural number following 999 and preceding 1001. Prefixes for 1000 include chilia- (Greek) and mill- (Latin).
In scientific notation, one thousand is written as 103. The SI prefix for a thousand is "kilo-".
The Roman numeral for thousand is M (for mille).
See also: millennium, year 1000 AD
Selected numbers in the thousands (1000-1999)
- 1001 - sphenic number, pentagonal number
- 1002 - sphenic number, Mertens function zero
- 1005 - Mertens function zero
- 1008 - divisible by the number of primes below it
- 1010 - Mertens function zero
- 1013 - Sophie Germain prime, centered square number, Mertens function zero
- 1014 - Mertens function zero
- 1015 - square pyramidal number
- 1018 - Mertens function zero
- 1019 - Sophie Germain prime, safe prime
- 1024 - power of two, 32^2
- 1027 - sum of the squares of the first eight primes
- 1031 - Sophie Germain prime
- 1035 - triangular number, hexagonal number
- 1049 - Sophie Germain prime
- 1051 - centered pentagonal number
- 1056 - pronic number
- 1060 - sum of the first 25 primes
- 1071 - heptagonal number
- 1072 - centered heptagonal number
- 1079 - Every positive integer is the sum of at most 1079 tenth powers.
- 1080 - pentagonal number
- 1081 - triangular number
- 1086 - Smith number
- 1089 - 33^2, nonagonal number, centered octagonal number
- 1092- divisible by the number of primes below it
- 1093 - star number
- 1103 - Sophie Germain prime
- 1104 - Keith number
- 1105 - Carmichael number, magic constant of nxn magic square and n-Queens Problem for n = 13, decagonal number, centered square number
- 1116 - divisible by the number of primes below it
- 1122 - pronic number, divisible by the number of primes below it
- 1128 - triangular number, hexagonal number, divisible by the number of primes below it
- 1134- divisible by the number of primes below it
- 1138 - special code for Easter eggs on Star Wars DVDs, because of George Lucas's movie THX-1138
- 1140 - tetrahedral number
- 1152 - highly totient number
- 1156 - 34^2, octahedral number, centered pentagonal number
- 1161 - sum of the first 26 primes
- 1162 - pentagonal number
- 1176 - triangular number
- 1177 - heptagonal number
- 1184 - amicable number with 1210
- 1187 - safe prime
- 1190 - pronic number
- 1198 - centered heptagonal number
- 1201 - centered square number
- 1210 - amicable number with 1184
- 1216 - nonagonal number
- 1219 - Mertens function zero
- 1220 - Mertens function zero
- 1223 - Sophie Germain prime
- 1225 - triangular number, 35^2, triangular square number, hexagonal number, centered octagonal number
- 1229 - Sophie Germain prime
- 1233 - 12^2 + 33^2
- 1240 - square pyramidal number
- 1241 - centered cube number
- 1242 - decagonal number
- 1247 - pentagonal number
- 1255 - Mertens function zero
- 1256 - Mertens function zero
- 1258 - Mertens function zero
- 1260 - highly composite number, pronic number, vampire number
- 1261 - star number, Mertens function zero
- 1264 - sum of the first 27 primes
- 1266 - centered pentagonal number, Mertens function zero
- 1270 - Mertens function zero
- 1279 - Mertens function zero
- 1280 - Mertens function zero
- 1282 - Mertens function zero
- 1283 - safe prime
- 1285 - Mertens function zero
- 1288 - heptagonal number
- 1289 - Sophie Germain prime, Mertens function zero
- 1291 - Mertens function zero
- 1292 - Mertens function zero
- 1296 - 36^2, fourth power of 6, sum of the cubes of the first eight positive integers
- 1297 - Mertens function zero
- 1299 - Mertens function zero
- 1300 - Mertens function zero
- 1301 - centered square number
- 1302 - Mertens function zero
- 1306 - Mertens function zero
- 1307 - safe prime
- 1318 - Mertens function zero
- 1319 - safe prime
- 1326 - triangular number, hexagonal number, Mertens function zero
- 1329 - Mertens function zero
- 1330 - tetrahedral number
- 1331 - cube of 11, centered heptagonal number
- 1332 - pronic number
- 1335 - pentagonal number, Mertens function zero
- 1336 - Mertens function zero
- 1338 - Mertens function zero
- 1342 - Mertens function zero
- 1350 - nonagonal number
- l367 - safe prime
- 1369 - 37^2, centered octagonal number
- 1371 - sum of the first 28 primes
- 1378 - triangular number
- 1379 - magic constant of nxn magic square and n-Queens Problem for n = 14.
- 1381 - centered pentagonal number
- 1387 - super-Poulet number, decagonal number
- 1395 - vampire number
- 1404 - heptagonal number
- 1405 = 26^2 + 27^2 = 7^2 + 8^2 + ... + 16^2, centered square number
- 1406 - pronic number, semi-meandric number
- 1409 - Sophie Germain prime
- 1419 - Zeisel number
- 1426 - pentagonal number
- 1431 - triangular number, hexagonal number
- 1435 - vampire number
- 1439 - Sophie Germain prime, safe prime
- 1440 - square pyramidal number
- 1441 - star number
- 1444 - 38^2
- 1451 - Sophie Germain prime
- 1469 - octahedral number
- 1470 - pentagonal pyramidal number
- 1471 - centered heptagonal number
- 1480 - sum of the first 29 primes
- 1481 - Sophie Germain prime
- 1482 - pronic number
- 1485 - triangular number
- 1487 - safe prime
- 1490 - tetranacci number
- 1491 - nonagonal number, Mertens function zero
- 1492 - Mertens function zero
- 1496 - square pyramidal number
- 1499 - Sophie Germain prime
- 1501 - centered pentagonal number
- 1511 - Sophie Germain prime
- 1513 - centered square number
- 1518 - Mertens function zero
- 1519 - Mertens function zero
- 1520 - pentagonal number, Mertens function zero
- 1521 - Mertens function zero, 39^2, centered octagonal number
- 1523 - Mertens function zero, safe prime
- 1524 - Mertens function zero
- 1525 - heptagonal number, Mertens function zero
- 1527 - Mertens function zero
- 1528 - Mertens function zero
- 1530 - vampire number
- 1531 - Mertens function zero
- 1532 - Mertens function zero
- 1537 - Keith number, Mertens function zero
- 1540 - triangular number, hexagonal number, decagonal number, tetrahedral number
- 1543 - Mertens function zero
- 1544 - Mertens function zero
- 1546 - Mertens function zero
- 1556 - sum of the squares of the first nine primes
- 1559 - Sophie Germain prime
- 1560 - pronic number
- 1575 - odd abundant number
- 1583 - Sophie Germain prime
- 1593 - sum of the first 30 primes
- 1596 - triangular number
- 1597 - Fibonacci number
- 1600 - 40^2, street number on Pennsylvania avenue of the White House, perfect score on the SAT
- 1601 - Sophie Germain prime, the novel 1601 (Mark Twain)
- 1617 - pentagonal number
- 1618 - centered heptagonal number
- 1619 - safe prime
- 1625 - centered square number
- 1626 - centered pentagonal number
- 1633 - star number
- 1638 - harmonic divisor number
- 1639 - nonagonal number
- 1640 - pronic number
- 1651 - heptagonal number
- 1653 - triangular number, hexagonal number
- 1657 - cuban prime
- 1680 - highly composite number
- 1681 - 41^2, smallest number yielded by the formula n^2 + n + 41 that is not a prime, centered octagonal number
- 1695 - magic constant of nxn magic square and n-Queens Problem for n = 15.
- 1701 - decagonal number, hull number of the Starship Enterprise on Star Trek
- 1705 - tribonacci number
- 1711 - triangular number
- 1717 - pentagonal number
- 1720 - sum of the first 31 primes
- 1722 - Giuga number, pronic number
- 1728 - cube of 12 and so is the number of cubic inches in a cubic foot
- 1729 - taxicab number, Carmichael number, Zeisel number, centered cube number. In the decimal expansion of NaodW29-math6c3cb7a674b3b2100000002, the first time all 10 digits appear in sequence starts at the 1729th decimal place. Trivia
- In 1979 the rock musical Hair closed on Broadway in New York City after 1729 performances.
- 1733 - Sophie Germain prime
- 1741 - centered square number
- 1756 - centered pentagonal number
- 1764 - 42^2
- 1770 - triangular number, hexagonal number, Town of Seventeen Seventy in Australia
- 1771 - tetrahedral number
- 1772 - centered heptagonal number
- 1782 - heptagonal number
- 1785 - square pyramidal number
- 1791 - largest natural number that cannot be expressed as a sum of at most four hexagonal numbers.
- 1794 - nonagonal number
- 1800 - pentagonal pyramidal number, also, in da Ponte's Don Giovanni, the number of women Don Giovanni had slept with so far when confronted by Donna Elvira, according to Leporello's tally
- 1801 - cuban prime
- 1806 - pronic number
- 1811 - Sophie Germain prime
- 1820 - pentagonal number
- 1823 - safe prime
- 1827 - vampire number
- 1828 - meandric number, open meandric number
- 1830 - triangular number
- 1834 - octahedral number, sum of the cubes of the first five primes
- 1837 - star number
- 1841 - Mertens function zero
- 1843 - Mertens function zero
- 1844 - Mertens function zero
- 1845 - Mertens function zero
- 1849 - 43^2, centered octagonal number
- 1851 - sum of the first 32 primes
- 1853 - Mertens function zero
- 1854 - Mertens function zero
- 1857 - Mertens function zero
- 1861 - centered square number, Mertens function zero
- 1862 - Mertens function zero
- 1863 - Mertens function zero
- 1864 - Mertens function zero
- 1866 - Mertens function zero
- 1870 - decagonal number
- 1885 - Zeisel number
- 1889 - Sophie Germain prime
- 1891 - triangular number, hexagonal number, centered pentagonal number
- 1892 - pronic number
- 1901 - Sophie Germain prime
- 1907 - safe prime
- 1918 - heptagonal number
- 1926 - pentagonal number
- 1929 - Mertens function zero
- 1931 - Sophie Germain prime
- 1933 - centered heptagonal number
- 1936 - 44^2
- 1938 - Mertens function zero
- 1951 - cuban prime
- 1953 - triangular number
- 1956 - nonagonal number
- 1969 - the movie 1969 (movie)
- 1973 - Sophie Germain prime
- 1980 - pronic number
- 1984 - see 1984 (disambiguation)
- 1985 - centered square number
- 1988 - sum of the first 33 primes
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