256525 has 12 divisors (see below), whose sum is σ = 329344. Its totient is φ = 198000.

The previous prime is 256517. The next prime is 256541. The reversal of 256525 is 525652.

It is not a de Polignac number, because 256525 - 2³ = 256517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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

256525 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 256525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 610 + ... + 940.

2²⁵⁶⁵²⁵ is an apocalyptic number.

256525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256525 is a deficient number, since it is larger than the sum of its proper divisors (72819).

256525 is a wasteful number, since it uses less digits than its factorization.

256525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 367 counting only the distinct ones).

The product of its digits is 3000, while the sum is 25.

The square root of 256525 is about 506.4829710859. The cubic root of 256525 is about 63.5394179383.

It can be divided in two parts, 2 and 56525, that multiplied together give a triangular number (113050 = T₄₇₅).

The spelling of 256525 in words is "two hundred fifty-six thousand, five hundred twenty-five".