25138504 has 8 divisors (see below), whose sum is σ = 47134710. Its totient is φ = 12569248.

The previous prime is 25138493. The next prime is 25138549. The reversal of 25138504 is 40583152.

It can be written as a sum of positive squares in only one way, i.e., 21178404 + 3960100 = 4602^2 + 1990^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1571149 + ... + 1571164.

Almost surely, 2^25138504 is an apocalyptic number.

It is an amenable number.

25138504 is a deficient number, since it is larger than the sum of its proper divisors (21996206).

25138504 is a wasteful number, since it uses less digits than its factorization.

25138504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142319 (or 3142315 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 25138504 is about 5013.8312695981. The cubic root of 25138504 is about 292.9407638834.

The spelling of 25138504 in words is "twenty-five million, one hundred thirty-eight thousand, five hundred four".