25139312 has 20 divisors (see below), whose sum is σ = 53135736. Its totient is φ = 11426880.

The previous prime is 25139291. The next prime is 25139321. The reversal of 25139312 is 21393152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71243 + ... + 71594.

Almost surely, 2^25139312 is an apocalyptic number.

25139312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25139312 is an abundant number, since it is smaller than the sum of its proper divisors (27996424).

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

25139312 is a wasteful number, since it uses less digits than its factorization.

25139312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142856 (or 142850 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 25139312 is about 5013.9118460539. The cubic root of 25139312 is about 292.9439024101.

The spelling of 25139312 in words is "twenty-five million, one hundred thirty-nine thousand, three hundred twelve".