25646725 has 48 divisors (see below), whose sum is σ = 36997632. Its totient is φ = 17487360.

The previous prime is 25646707. The next prime is 25646737. The reversal of 25646725 is 52764652.

It is not a de Polignac number, because 25646725 - 2⁹ = 25646213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 351289 + ... + 351361.

It is an arithmetic number, because the mean of its divisors is an integer number (770784).

Almost surely, 2^25646725 is an apocalyptic number.

25646725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25646725 is a deficient number, since it is larger than the sum of its proper divisors (11350907).

25646725 is a wasteful number, since it uses less digits than its factorization.

25646725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 161 counting only the distinct ones).

The product of its digits is 100800, while the sum is 37.

The square root of 25646725 is about 5064.2595707566. The cubic root of 25646725 is about 294.9017196312.

The spelling of 25646725 in words is "twenty-five million, six hundred forty-six thousand, seven hundred twenty-five".