25139232 has 72 divisors (see below), whose sum is σ = 73267740. Its totient is φ = 8171520.

The previous prime is 25139227. The next prime is 25139239. The reversal of 25139232 is 23293152.

It can be written as a sum of positive squares in 2 ways, for example, as 21123216 + 4016016 = 4596^2 + 2004^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a junction number, because it is equal to n+sod(n) for n = 25139196 and 25139205.

It is not an unprimeable number, because it can be changed into a prime (25139239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10744 + ... + 12872.

Almost surely, 2^25139232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25139232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36633870).

25139232 is an abundant number, since it is smaller than the sum of its proper divisors (48128508).

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

25139232 is a wasteful number, since it uses less digits than its factorization.

25139232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186 (or 2175 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 25139232 is about 5013.9038682448. The cubic root of 25139232 is about 292.9435916679.

The spelling of 25139232 in words is "twenty-five million, one hundred thirty-nine thousand, two hundred thirty-two".