25385865 has 16 divisors (see below), whose sum is σ = 40754688. Its totient is φ = 13493376.

The previous prime is 25385851. The next prime is 25385891. The reversal of 25385865 is 56858352.

It is not a de Polignac number, because 25385865 - 2¹⁴ = 25369481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1992 + ... + 7398.

It is an arithmetic number, because the mean of its divisors is an integer number (2547168).

Almost surely, 2^25385865 is an apocalyptic number.

It is an amenable number.

25385865 is a deficient number, since it is larger than the sum of its proper divisors (15368823).

25385865 is a wasteful number, since it uses less digits than its factorization.

25385865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5728.

The product of its digits is 288000, while the sum is 42.

The square root of 25385865 is about 5038.4387462785. The cubic root of 25385865 is about 293.8984678788.

The spelling of 25385865 in words is "twenty-five million, three hundred eighty-five thousand, eight hundred sixty-five".