256937 has 4 divisors (see below), whose sum is σ = 270480. Its totient is φ = 243396.

The previous prime is 256931. The next prime is 256939. The reversal of 256937 is 739652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256937 - 2⁶ = 256873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6743 + ... + 6780.

It is an arithmetic number, because the mean of its divisors is an integer number (67620).

2²⁵⁶⁹³⁷ is an apocalyptic number.

It is an amenable number.

256937 is a deficient number, since it is larger than the sum of its proper divisors (13543).

256937 is a wasteful number, since it uses less digits than its factorization.

256937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13542.

The product of its digits is 11340, while the sum is 32.

The square root of 256937 is about 506.8895343169. The cubic root of 256937 is about 63.5734162333.

The spelling of 256937 in words is "two hundred fifty-six thousand, nine hundred thirty-seven".