25642426 has 16 divisors (see below), whose sum is σ = 40861800. Its totient is φ = 12026880.

The previous prime is 25642423. The next prime is 25642433. The reversal of 25642426 is 62424652.

It can be written as a sum of positive squares in 4 ways, for example, as 25553025 + 89401 = 5055^2 + 299^2 .

It is a super-2 number, since 2×25642426² = 1315068022330952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25642423) 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 7 ways as a sum of consecutive naturals, for example, 10786 + ... + 12946.

Almost surely, 2^25642426 is an apocalyptic number.

25642426 is a deficient number, since it is larger than the sum of its proper divisors (15219374).

25642426 is a wasteful number, since it uses less digits than its factorization.

25642426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529.

The product of its digits is 23040, while the sum is 31.

The square root of 25642426 is about 5063.8351078999. The cubic root of 25642426 is about 294.8852412005.

The spelling of 25642426 in words is "twenty-five million, six hundred forty-two thousand, four hundred twenty-six".