25565012 has 24 divisors (see below), whose sum is σ = 49288512. Its totient is φ = 11505600.

The previous prime is 25565011. The next prime is 25565021. The reversal of 25565012 is 21056552.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25565011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1712 + ... + 7352.

It is an arithmetic number, because the mean of its divisors is an integer number (2053688).

Almost surely, 2^25565012 is an apocalyptic number.

25565012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25565012 is a deficient number, since it is larger than the sum of its proper divisors (23723500).

25565012 is a wasteful number, since it uses less digits than its factorization.

25565012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5759 (or 5757 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 25565012 is about 5056.1855187483. The cubic root of 25565012 is about 294.5881910781.

The spelling of 25565012 in words is "twenty-five million, five hundred sixty-five thousand, twelve".