25125138 has 24 divisors (see below), whose sum is σ = 54650700. Its totient is φ = 8342304.

The previous prime is 25125083. The next prime is 25125151. The reversal of 25125138 is 83152152.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24830289 + 294849 = 4983^2 + 543^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2248 + ... + 7436.

Almost surely, 2^25125138 is an apocalyptic number.

25125138 is an abundant number, since it is smaller than the sum of its proper divisors (29525562).

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

25125138 is a wasteful number, since it uses less digits than its factorization.

25125138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5466 (or 5463 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 25125138 is about 5012.4981795508. The cubic root of 25125138 is about 292.8888363649. Note that the first 4 decimals are identical.

The spelling of 25125138 in words is "twenty-five million, one hundred twenty-five thousand, one hundred thirty-eight".