25421936 has 20 divisors (see below), whose sum is σ = 52152912. Its totient is φ = 11963136.

The previous prime is 25421899. The next prime is 25421939. The reversal of 25421936 is 63912452.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25421939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46460 + ... + 47003.

Almost surely, 2^25421936 is an apocalyptic number.

It is an amenable number.

25421936 is an abundant number, since it is smaller than the sum of its proper divisors (26730976).

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

25421936 is a wasteful number, since it uses less digits than its factorization.

25421936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93488 (or 93482 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 25421936 is about 5042.0170566947. The cubic root of 25421936 is about 294.0376029772.

The spelling of 25421936 in words is "twenty-five million, four hundred twenty-one thousand, nine hundred thirty-six".