25642956 has 12 divisors (see below), whose sum is σ = 59833592. Its totient is φ = 8547648.

The previous prime is 25642949. The next prime is 25642957. The reversal of 25642956 is 65924652.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×25642956² = 1315122384835872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25642957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1068445 + ... + 1068468.

Almost surely, 2^25642956 is an apocalyptic number.

It is an amenable number.

25642956 is an abundant number, since it is smaller than the sum of its proper divisors (34190636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25642956 is a wasteful number, since it uses less digits than its factorization.

25642956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136920 (or 2136918 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 25642956 is about 5063.8874395073. The cubic root of 25642956 is about 294.8872728349.

The spelling of 25642956 in words is "twenty-five million, six hundred forty-two thousand, nine hundred fifty-six".