256996 has 12 divisors (see below), whose sum is σ = 459648. Its totient is φ = 125672.

The previous prime is 256981. The next prime is 257003. The reversal of 256996 is 699652.

It is a happy number.

It is an unprimeable number.

256996 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496 + ... + 871.

It is an arithmetic number, because the mean of its divisors is an integer number (38304).

2²⁵⁶⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

256996 is a deficient number, since it is larger than the sum of its proper divisors (202652).

256996 is a wasteful number, since it uses less digits than its factorization.

256996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418 (or 1416 counting only the distinct ones).

The product of its digits is 29160, while the sum is 37.

The square root of 256996 is about 506.9477290609. The cubic root of 256996 is about 63.5782819455.

It can be divided in two parts, 25 and 6996, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 256996 in words is "two hundred fifty-six thousand, nine hundred ninety-six".