25565456 has 30 divisors (see below), whose sum is σ = 57621870. Its totient is φ = 10956288.

The previous prime is 25565453. The next prime is 25565479. The reversal of 25565456 is 65456552.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23193856 + 2371600 = 4816^2 + 1540^2 .

It is not an unprimeable number, because it can be changed into a prime (25565453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15521 + ... + 17088.

It is an arithmetic number, because the mean of its divisors is an integer number (1920729).

Almost surely, 2^25565456 is an apocalyptic number.

It is an amenable number.

25565456 is an abundant number, since it is smaller than the sum of its proper divisors (32056414).

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

25565456 is a wasteful number, since it uses less digits than its factorization.

25565456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32631 (or 32618 counting only the distinct ones).

The product of its digits is 180000, while the sum is 38.

The square root of 25565456 is about 5056.2294251745. The cubic root of 25565456 is about 294.5898964870.

The spelling of 25565456 in words is "twenty-five million, five hundred sixty-five thousand, four hundred fifty-six".