25665925 has 12 divisors (see below), whose sum is σ = 31895776. Its totient is φ = 20487600.

The previous prime is 25665911. The next prime is 25665929. The reversal of 25665925 is 52956652.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-25665925 is a prime.

It is a super-2 number, since 2×25665925² = 1317479412211250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25665929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14962 + ... + 16588.

Almost surely, 2^25665925 is an apocalyptic number.

25665925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25665925 is a deficient number, since it is larger than the sum of its proper divisors (6229851).

25665925 is a wasteful number, since it uses less digits than its factorization.

25665925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268 (or 2263 counting only the distinct ones).

The product of its digits is 162000, while the sum is 40.

The square root of 25665925 is about 5066.1548535354. The cubic root of 25665925 is about 294.9752923863.

The spelling of 25665925 in words is "twenty-five million, six hundred sixty-five thousand, nine hundred twenty-five".