256085025 has 72 divisors (see below), whose sum is σ = 521618400. Its totient is φ = 110154240.

The previous prime is 256084987. The next prime is 256085033. The reversal of 256085025 is 520580652.

It is not a de Polignac number, because 256085025 - 2⁷ = 256084897 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 60426 + ... + 64524.

It is an arithmetic number, because the mean of its divisors is an integer number (7244700).

Almost surely, 2^256085025 is an apocalyptic number.

256085025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256085025 is an abundant number, since it is smaller than the sum of its proper divisors (265533375).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256085025 is a wasteful number, since it uses less digits than its factorization.

256085025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143 (or 4131 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 256085025 is about 16002.6568106674. The cubic root of 256085025 is about 635.0307092429.

The spelling of 256085025 in words is "two hundred fifty-six million, eighty-five thousand, twenty-five".