25685025 has 12 divisors (see below), whose sum is σ = 42466032. Its totient is φ = 13698640.

The previous prime is 25685021. The next prime is 25685041. The reversal of 25685025 is 52058652.

It is not a de Polignac number, because 25685025 - 2² = 25685021 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25685021) 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, 171159 + ... + 171308.

It is an arithmetic number, because the mean of its divisors is an integer number (3538836).

Almost surely, 2^25685025 is an apocalyptic number.

25685025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25685025 is a deficient number, since it is larger than the sum of its proper divisors (16781007).

25685025 is a wasteful number, since it uses less digits than its factorization.

25685025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342480 (or 342475 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 25685025 is about 5068.0395618030. The cubic root of 25685025 is about 295.0484455533.

The spelling of 25685025 in words is "twenty-five million, six hundred eighty-five thousand, twenty-five".