25971525 has 18 divisors (see below), whose sum is σ = 46518290. Its totient is φ = 13851360.

The previous prime is 25971523. The next prime is 25971541. The reversal of 25971525 is 52517952.

It can be written as a sum of positive squares in 3 ways, for example, as 236196 + 25735329 = 486^2 + 5073^2 .

It is not a de Polignac number, because 25971525 - 2¹ = 25971523 is a prime.

It is a super-2 number, since 2×25971525² = 1349040221651250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25971525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25971523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 57490 + ... + 57939.

Almost surely, 2^25971525 is an apocalyptic number.

25971525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25971525 is a deficient number, since it is larger than the sum of its proper divisors (20546765).

25971525 is a wasteful number, since it uses less digits than its factorization.

25971525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115445 (or 115437 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 25971525 is about 5096.2265451999. The cubic root of 25971525 is about 296.1414172381.

The spelling of 25971525 in words is "twenty-five million, nine hundred seventy-one thousand, five hundred twenty-five".