25161256 has 8 divisors (see below), whose sum is σ = 47177370. Its totient is φ = 12580624.

The previous prime is 25161251. The next prime is 25161307. The reversal of 25161256 is 65216152.

It can be written as a sum of positive squares in only one way, i.e., 15760900 + 9400356 = 3970^2 + 3066^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25161251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1572571 + ... + 1572586.

Almost surely, 2^25161256 is an apocalyptic number.

It is an amenable number.

25161256 is a deficient number, since it is larger than the sum of its proper divisors (22016114).

25161256 is a wasteful number, since it uses less digits than its factorization.

25161256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145163 (or 3145159 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 25161256 is about 5016.0996800303. The cubic root of 25161256 is about 293.0291141225.

The spelling of 25161256 in words is "twenty-five million, one hundred sixty-one thousand, two hundred fifty-six".