25139394 has 48 divisors (see below), whose sum is σ = 65532480. Its totient is φ = 6804000.

The previous prime is 25139383. The next prime is 25139399. The reversal of 25139394 is 49393152.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25139399) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2857 + ... + 7644.

It is an arithmetic number, because the mean of its divisors is an integer number (1365260).

Almost surely, 2^25139394 is an apocalyptic number.

25139394 is an abundant number, since it is smaller than the sum of its proper divisors (40393086).

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

25139394 is a wasteful number, since it uses less digits than its factorization.

25139394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10535 (or 10532 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 25139394 is about 5013.9200232951. The cubic root of 25139394 is about 292.9442209202.

The spelling of 25139394 in words is "twenty-five million, one hundred thirty-nine thousand, three hundred ninety-four".