25642994 has 16 divisors (see below), whose sum is σ = 41659800. Its totient is φ = 11767680.

The previous prime is 25642973. The next prime is 25643063. The reversal of 25642994 is 49924652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4141225 + 21501769 = 2035^2 + 4637^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1982 + ... + 7430.

Almost surely, 2^25642994 is an apocalyptic number.

25642994 is a deficient number, since it is larger than the sum of its proper divisors (16016806).

25642994 is a wasteful number, since it uses less digits than its factorization.

25642994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5645.

The product of its digits is 155520, while the sum is 41.

The square root of 25642994 is about 5063.8911915641. The cubic root of 25642994 is about 294.8874184982.

The spelling of 25642994 in words is "twenty-five million, six hundred forty-two thousand, nine hundred ninety-four".