25012539 has 6 divisors (see below), whose sum is σ = 36129236. Its totient is φ = 16675020.

The previous prime is 25012511. The next prime is 25012543. The reversal of 25012539 is 93521052.

It is not a de Polignac number, because 25012539 - 2⁷ = 25012411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25012739) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1389577 + ... + 1389594.

Almost surely, 2^25012539 is an apocalyptic number.

25012539 is a deficient number, since it is larger than the sum of its proper divisors (11116697).

25012539 is a wasteful number, since it uses less digits than its factorization.

25012539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779177 (or 2779174 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 25012539 is about 5001.2537428129. The cubic root of 25012539 is about 292.4506513284.

The spelling of 25012539 in words is "twenty-five million, twelve thousand, five hundred thirty-nine".