25540625 has 24 divisors (see below), whose sum is σ = 34872768. Its totient is φ = 18550000.

The previous prime is 25540607. The next prime is 25540651. The reversal of 25540625 is 52604552.

It is not a de Polignac number, because 25540625 - 2⁸ = 25540369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34004 + ... + 34746.

It is an arithmetic number, because the mean of its divisors is an integer number (1453032).

Almost surely, 2^25540625 is an apocalyptic number.

25540625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25540625 is a deficient number, since it is larger than the sum of its proper divisors (9332143).

25540625 is an frugal number, since it uses more digits than its factorization.

25540625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 25540625 is about 5053.7733427608. The cubic root of 25540625 is about 294.4944899970.

The spelling of 25540625 in words is "twenty-five million, five hundred forty thousand, six hundred twenty-five".