25506625 has 16 divisors (see below), whose sum is σ = 31973760. Its totient is φ = 20314800.

The previous prime is 25506623. The next prime is 25506643. The reversal of 25506625 is 52660552.

It is not a de Polignac number, because 25506625 - 2¹ = 25506623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25506623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52132 + ... + 52618.

It is an arithmetic number, because the mean of its divisors is an integer number (1998360).

Almost surely, 2^25506625 is an apocalyptic number.

25506625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25506625 is a deficient number, since it is larger than the sum of its proper divisors (6467135).

25506625 is an equidigital number, since it uses as much as digits as its factorization.

25506625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921 (or 911 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 25506625 is about 5050.4083993277. The cubic root of 25506625 is about 294.3637537156.

The spelling of 25506625 in words is "twenty-five million, five hundred six thousand, six hundred twenty-five".