One thousand
1000 is an even number.
1000 is a Harshad number, which means it is divisible by the sum of its digits (1 + 0 + 0 + 0 = 1, and 1000 is divisible by 1).
In binary, 1000 is represented as 1111101000.
In hex, 1000 is represented as 3e8.
Prime factorization of 1000: 23 * 53.
Factors of 1000 are: 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000.