25663425 has 12 divisors (see below), whose sum is σ = 42430320. Its totient is φ = 13687120.

The previous prime is 25663399. The next prime is 25663481. The reversal of 25663425 is 52436652.

It is not a de Polignac number, because 25663425 - 2⁶ = 25663361 is a prime.

It is a super-2 number, since 2×25663425² = 1317222765461250, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171015 + ... + 171164.

It is an arithmetic number, because the mean of its divisors is an integer number (3535860).

Almost surely, 2^25663425 is an apocalyptic number.

25663425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25663425 is a deficient number, since it is larger than the sum of its proper divisors (16766895).

25663425 is a wasteful number, since it uses less digits than its factorization.

25663425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342192 (or 342187 counting only the distinct ones).

The product of its digits is 43200, while the sum is 33.

The square root of 25663425 is about 5065.9081120763. The cubic root of 25663425 is about 294.9657146787.

The spelling of 25663425 in words is "twenty-five million, six hundred sixty-three thousand, four hundred twenty-five".