25756625 has 16 divisors (see below), whose sum is σ = 33018960. Its totient is φ = 20044800.

The previous prime is 25756603. The next prime is 25756637. The reversal of 25756625 is 52665752.

It can be written as a sum of positive squares in 8 ways, for example, as 7059649 + 18696976 = 2657^2 + 4324^2 .

It is not a de Polignac number, because 25756625 - 2¹⁸ = 25494481 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1841 + ... + 7409.

It is an arithmetic number, because the mean of its divisors is an integer number (2063685).

Almost surely, 2^25756625 is an apocalyptic number.

25756625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25756625 is a deficient number, since it is larger than the sum of its proper divisors (7262335).

25756625 is an equidigital number, since it uses as much as digits as its factorization.

25756625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5621 (or 5611 counting only the distinct ones).

The product of its digits is 126000, while the sum is 38.

The square root of 25756625 is about 5075.0985212112. The cubic root of 25756625 is about 295.3223518358.

The spelling of 25756625 in words is "twenty-five million, seven hundred fifty-six thousand, six hundred twenty-five".