# 1000 (number)

## Natural number / From Wikipedia, the free encyclopedia

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**1000** or **one thousand** is the natural number following 999 and preceding 1001. In most English-speaking countries, it can be written with or without a comma or sometimes a period separating the thousands digit: **1,000**.

**Quick facts: ← 999 1000 1001 → , Cardinal, Ordinal, Fac...**▼

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Cardinal | one thousand | |||

Ordinal | 1000th (one thousandth) | |||

Factorization | 2^{3} × 5^{3} | |||

Divisors | 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000 | |||

Greek numeral | ,Α´ | |||

Roman numeral | M | |||

Roman numeral (unicode) | M, m, ↀ | |||

Unicode symbol(s) | ↀ | |||

Greek prefix | chilia | |||

Latin prefix | milli | |||

Binary | 1111101000_{2} | |||

Ternary | 1101001_{3} | |||

Senary | 4344_{6} | |||

Octal | 1750_{8} | |||

Duodecimal | 6B4_{12} | |||

Hexadecimal | 3E8_{16} | |||

Tamil | ௲ | |||

Chinese | 千 | |||

Punjabi | ੧੦੦੦ |

A group of one thousand things is sometimes known, from Ancient Greek, as a **chiliad**.[1] A period of one thousand years may be known as a chiliad or, more often from Latin, as a millennium.

The number 1000 is also sometimes described as a **short thousand** in medieval contexts where it is necessary to distinguish the Germanic concept of 1200 as a long thousand.