25645256 has 32 divisors (see below), whose sum is σ = 59183040. Its totient is φ = 10145088.

The previous prime is 25645247. The next prime is 25645267. The reversal of 25645256 is 65254652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16886 + ... + 18341.

It is an arithmetic number, because the mean of its divisors is an integer number (1849470).

Almost surely, 2^25645256 is an apocalyptic number.

25645256 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

25645256 is an abundant number, since it is smaller than the sum of its proper divisors (33537784).

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

25645256 is a wasteful number, since it uses less digits than its factorization.

25645256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35253 (or 35249 counting only the distinct ones).

The product of its digits is 72000, while the sum is 35.

The square root of 25645256 is about 5064.1145326701. The cubic root of 25645256 is about 294.8960890370.

The spelling of 25645256 in words is "twenty-five million, six hundred forty-five thousand, two hundred fifty-six".