25565642 has 8 divisors (see below), whose sum is σ = 38371296. Its totient is φ = 12775212.

The previous prime is 25565641. The next prime is 25565647. The reversal of 25565642 is 24656552.

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

It is not an unprimeable number, because it can be changed into a prime (25565641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2453 + ... + 7559.

It is an arithmetic number, because the mean of its divisors is an integer number (4796412).

Almost surely, 2^25565642 is an apocalyptic number.

25565642 is a deficient number, since it is larger than the sum of its proper divisors (12805654).

25565642 is a wasteful number, since it uses less digits than its factorization.

25565642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7612.

The product of its digits is 72000, while the sum is 35.

The square root of 25565642 is about 5056.2478182937. The cubic root of 25565642 is about 294.5906109092.

The spelling of 25565642 in words is "twenty-five million, five hundred sixty-five thousand, six hundred forty-two".