25217925 has 12 divisors (see below), whose sum is σ = 41693760. Its totient is φ = 13449520.

The previous prime is 25217917. The next prime is 25217939. The reversal of 25217925 is 52971252.

It is a happy number.

It is not a de Polignac number, because 25217925 - 2³ = 25217917 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168045 + ... + 168194.

It is an arithmetic number, because the mean of its divisors is an integer number (3474480).

Almost surely, 2^25217925 is an apocalyptic number.

25217925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25217925 is a deficient number, since it is larger than the sum of its proper divisors (16475835).

25217925 is a wasteful number, since it uses less digits than its factorization.

25217925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336252 (or 336247 counting only the distinct ones).

The product of its digits is 12600, while the sum is 33.

The square root of 25217925 is about 5021.7452145644. The cubic root of 25217925 is about 293.2489390766.

The spelling of 25217925 in words is "twenty-five million, two hundred seventeen thousand, nine hundred twenty-five".