25646442 has 8 divisors (see below), whose sum is σ = 51292896. Its totient is φ = 8548812.

The previous prime is 25646437. The next prime is 25646483. The reversal of 25646442 is 24464652.

It is a sphenic number, since it is the product of 3 distinct primes.

25646442 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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, 2137198 + ... + 2137209.

It is an arithmetic number, because the mean of its divisors is an integer number (6411612).

Almost surely, 2^25646442 is an apocalyptic number.

25646442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25646442 is a wasteful number, since it uses less digits than its factorization.

25646442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4274412.

The product of its digits is 46080, while the sum is 33.

The square root of 25646442 is about 5064.2316297737. The cubic root of 25646442 is about 294.9006349249.

The spelling of 25646442 in words is "twenty-five million, six hundred forty-six thousand, four hundred forty-two".