25025138 has 4 divisors (see below), whose sum is σ = 37537710. Its totient is φ = 12512568.

The previous prime is 25025137. The next prime is 25025141. The reversal of 25025138 is 83152052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21132409 + 3892729 = 4597^2 + 1973^2 .

It is not an unprimeable number, because it can be changed into a prime (25025137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256283 + ... + 6256286.

Almost surely, 2^25025138 is an apocalyptic number.

25025138 is a deficient number, since it is larger than the sum of its proper divisors (12512572).

25025138 is a wasteful number, since it uses less digits than its factorization.

25025138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12512571.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 25025138 is about 5002.5131683985. The cubic root of 25025138 is about 292.4997462681.

The spelling of 25025138 in words is "twenty-five million, twenty-five thousand, one hundred thirty-eight".