25997424 has 20 divisors (see below), whose sum is σ = 67160136. Its totient is φ = 8665792.

The previous prime is 25997357. The next prime is 25997443. The reversal of 25997424 is 42479952.

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, 270759 + ... + 270854.

Almost surely, 2^25997424 is an apocalyptic number.

25997424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25997424 is an abundant number, since it is smaller than the sum of its proper divisors (41162712).

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

25997424 is a wasteful number, since it uses less digits than its factorization.

25997424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541624 (or 541618 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 25997424 is about 5098.7669097538. The cubic root of 25997424 is about 296.2398226844.

The spelling of 25997424 in words is "twenty-five million, nine hundred ninety-seven thousand, four hundred twenty-four".