25208865 has 48 divisors (see below), whose sum is σ = 48162816. Its totient is φ = 12096000.

The previous prime is 25208861. The next prime is 25208899. The reversal of 25208865 is 56880252.

It is not a de Polignac number, because 25208865 - 2² = 25208861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25208861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62665 + ... + 63065.

It is an arithmetic number, because the mean of its divisors is an integer number (1003392).

Almost surely, 2^25208865 is an apocalyptic number.

It is an amenable number.

25208865 is a deficient number, since it is larger than the sum of its proper divisors (22953951).

25208865 is a wasteful number, since it uses less digits than its factorization.

25208865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 25208865 is about 5020.8430566987. The cubic root of 25208865 is about 293.2138165249.

The spelling of 25208865 in words is "twenty-five million, two hundred eight thousand, eight hundred sixty-five".