25139952 has 30 divisors (see below), whose sum is σ = 70357352. Its totient is φ = 8379936.

The previous prime is 25139927. The next prime is 25139969. The reversal of 25139952 is 25993152.

It is a happy number.

25139952 is a `hidden beast` number, since 2 + 513 + 99 + 52 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 87148 + ... + 87435.

Almost surely, 2^25139952 is an apocalyptic number.

It is an amenable number.

25139952 is an abundant number, since it is smaller than the sum of its proper divisors (45217400).

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

25139952 is a wasteful number, since it uses less digits than its factorization.

25139952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174597 (or 174588 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 25139952 is about 5013.9756680702. The cubic root of 25139952 is about 292.9463883242.

The spelling of 25139952 in words is "twenty-five million, one hundred thirty-nine thousand, nine hundred fifty-two".