25269921 has 32 divisors (see below), whose sum is σ = 38787200. Its totient is φ = 16251840.

The previous prime is 25269913. The next prime is 25269941. The reversal of 25269921 is 12996252.

It is a happy number.

It is not a de Polignac number, because 25269921 - 2³ = 25269913 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

Its product of digits (19440) is a multiple of the sum of its prime divisors (360).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25269901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110235 + ... + 110463.

It is an arithmetic number, because the mean of its divisors is an integer number (1212100).

Almost surely, 2^25269921 is an apocalyptic number.

It is an amenable number.

25269921 is a deficient number, since it is larger than the sum of its proper divisors (13517279).

25269921 is a wasteful number, since it uses less digits than its factorization.

25269921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 360 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 25269921 is about 5026.9196333341. The cubic root of 25269921 is about 293.4503474557.

The spelling of 25269921 in words is "twenty-five million, two hundred sixty-nine thousand, nine hundred twenty-one".