25623925 has 6 divisors (see below), whose sum is σ = 31773698. Its totient is φ = 20499120.

The previous prime is 25623919. The next prime is 25623931. The reversal of 25623925 is 52932652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25623919) and next prime (25623931).

It can be written as a sum of positive squares in 3 ways, for example, as 81 + 25623844 = 9^2 + 5062^2 .

It is not a de Polignac number, because 25623925 - 2⁷ = 25623797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 512454 + ... + 512503.

Almost surely, 2^25623925 is an apocalyptic number.

25623925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25623925 is a deficient number, since it is larger than the sum of its proper divisors (6149773).

25623925 is a wasteful number, since it uses less digits than its factorization.

25623925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024967 (or 1024962 counting only the distinct ones).

The product of its digits is 32400, while the sum is 34.

The square root of 25623925 is about 5062.0080007839. The cubic root of 25623925 is about 294.8143042767.

The spelling of 25623925 in words is "twenty-five million, six hundred twenty-three thousand, nine hundred twenty-five".