25131256 has 16 divisors (see below), whose sum is σ = 47174400. Its totient is φ = 12551424.

The previous prime is 25131241. The next prime is 25131257. The reversal of 25131256 is 65213152.

It is a self number, because there is not a number n which added to its sum of digits gives 25131256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25131257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12360 + ... + 14248.

It is an arithmetic number, because the mean of its divisors is an integer number (2948400).

Almost surely, 2^25131256 is an apocalyptic number.

It is an amenable number.

25131256 is a deficient number, since it is larger than the sum of its proper divisors (22043144).

25131256 is a wasteful number, since it uses less digits than its factorization.

25131256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3558 (or 3554 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 25131256 is about 5013.1084169405. The cubic root of 25131256 is about 292.9126073584.

It can be divided in two parts, 2513 and 1256, that multiplied together give a triangular number (3156328 = T₂₅₁₂).

The spelling of 25131256 in words is "twenty-five million, one hundred thirty-one thousand, two hundred fifty-six".