25399225 has 12 divisors (see below), whose sum is σ = 31622976. Its totient is φ = 20236880.

The previous prime is 25399193. The next prime is 25399229. The reversal of 25399225 is 52299352.

It is not a de Polignac number, because 25399225 - 2⁵ = 25399193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25399229) 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, 4644 + ... + 8506.

It is an arithmetic number, because the mean of its divisors is an integer number (2635248).

Almost surely, 2^25399225 is an apocalyptic number.

25399225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25399225 is a deficient number, since it is larger than the sum of its proper divisors (6223751).

25399225 is a wasteful number, since it uses less digits than its factorization.

25399225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136 (or 4131 counting only the distinct ones).

The product of its digits is 48600, while the sum is 37.

The square root of 25399225 is about 5039.7643794130. The cubic root of 25399225 is about 293.9500161837.

The spelling of 25399225 in words is "twenty-five million, three hundred ninety-nine thousand, two hundred twenty-five".