256955 has 8 divisors (see below), whose sum is σ = 326592. Its totient is φ = 193408.

The previous prime is 256939. The next prime is 256957. The reversal of 256955 is 559652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256955 - 2⁴ = 256939 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256955.

It is not an unprimeable number, because it can be changed into a prime (256957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1427 + ... + 1596.

It is an arithmetic number, because the mean of its divisors is an integer number (40824).

2²⁵⁶⁹⁵⁵ is an apocalyptic number.

256955 is a deficient number, since it is larger than the sum of its proper divisors (69637).

256955 is a wasteful number, since it uses less digits than its factorization.

256955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045.

The product of its digits is 13500, while the sum is 32.

The square root of 256955 is about 506.9072893538. The cubic root of 256955 is about 63.5749007668.

The spelling of 256955 in words is "two hundred fifty-six thousand, nine hundred fifty-five".