25138875 has 32 divisors (see below), whose sum is σ = 42831360. Its totient is φ = 13087200.

The previous prime is 25138871. The next prime is 25138943. The reversal of 25138875 is 57883152.

25138875 = 385² + 386² + ... + 509².

It is not a de Polignac number, because 25138875 - 2² = 25138871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25138871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15346 + ... + 16904.

It is an arithmetic number, because the mean of its divisors is an integer number (1338480).

Almost surely, 2^25138875 is an apocalyptic number.

25138875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25138875 is a deficient number, since it is larger than the sum of its proper divisors (17692485).

25138875 is a wasteful number, since it uses less digits than its factorization.

25138875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620 (or 1610 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 25138875 is about 5013.8682671167. The cubic root of 25138875 is about 292.9422049727.

The spelling of 25138875 in words is "twenty-five million, one hundred thirty-eight thousand, eight hundred seventy-five".