25917625 has 8 divisors (see below), whose sum is σ = 32345352. Its totient is φ = 20734000.

The previous prime is 25917611. The next prime is 25917629. The reversal of 25917625 is 52671952.

It can be written as a sum of positive squares in 4 ways, for example, as 273529 + 25644096 = 523^2 + 5064^2 .

It is not a de Polignac number, because 25917625 - 2¹⁵ = 25884857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25917629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103546 + ... + 103795.

It is an arithmetic number, because the mean of its divisors is an integer number (4043169).

Almost surely, 2^25917625 is an apocalyptic number.

25917625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25917625 is a deficient number, since it is larger than the sum of its proper divisors (6427727).

25917625 is an equidigital number, since it uses as much as digits as its factorization.

25917625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207356 (or 207346 counting only the distinct ones).

The product of its digits is 37800, while the sum is 37.

The square root of 25917625 is about 5090.9355721714. The cubic root of 25917625 is about 295.9364096718.

The spelling of 25917625 in words is "twenty-five million, nine hundred seventeen thousand, six hundred twenty-five".