25190865 has 128 divisors (see below), whose sum is σ = 57139200. Its totient is φ = 10264320.

The previous prime is 25190863. The next prime is 25190873. The reversal of 25190865 is 56809152.

It is a happy number.

It is not a de Polignac number, because 25190865 - 2¹ = 25190863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25190863) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 412935 + ... + 412995.

It is an arithmetic number, because the mean of its divisors is an integer number (446400).

Almost surely, 2^25190865 is an apocalyptic number.

It is an amenable number.

25190865 is an abundant number, since it is smaller than the sum of its proper divisors (31948335).

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

25190865 is a wasteful number, since it uses less digits than its factorization.

25190865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 25190865 is about 5019.0502089539. The cubic root of 25190865 is about 293.1440116449.

The spelling of 25190865 in words is "twenty-five million, one hundred ninety thousand, eight hundred sixty-five".