25264921 has 12 divisors (see below), whose sum is σ = 28249200. Its totient is φ = 22572440.

The previous prime is 25264913. The next prime is 25264933. The reversal of 25264921 is 12946252.

It is not a de Polignac number, because 25264921 - 2³ = 25264913 is a prime.

It is a super-3 number, since 3×25264921³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (25264961) 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, 5370 + ... + 8908.

It is an arithmetic number, because the mean of its divisors is an integer number (2354100).

Almost surely, 2^25264921 is an apocalyptic number.

It is an amenable number.

25264921 is a deficient number, since it is larger than the sum of its proper divisors (2984279).

25264921 is a wasteful number, since it uses less digits than its factorization.

25264921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620 (or 3609 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 25264921 is about 5026.4222862788. The cubic root of 25264921 is about 293.4309917889.

It can be divided in two parts, 2526 and 4921, that added together give a palindrome (7447).

The spelling of 25264921 in words is "twenty-five million, two hundred sixty-four thousand, nine hundred twenty-one".