256907 has 10 divisors (see below), whose sum is σ = 302508. Its totient is φ = 218148.

The previous prime is 256903. The next prime is 256931. The reversal of 256907 is 709652.

It is not a de Polignac number, because 256907 - 2² = 256903 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹¹ + 5⁷ + 9⁵ + 6² + 0 + 7⁶ .

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256907.

It is not an unprimeable number, because it can be changed into a prime (256901) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2348 + ... + 2454.

2²⁵⁶⁹⁰⁷ is an apocalyptic number.

256907 is a deficient number, since it is larger than the sum of its proper divisors (45601).

256907 is an frugal number, since it uses more digits than its factorization.

256907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 256907 is about 506.8599412066. The cubic root of 256907 is about 63.5709418567.

The spelling of 256907 in words is "two hundred fifty-six thousand, nine hundred seven".