25641742 has 32 divisors (see below), whose sum is σ = 45904320. Its totient is φ = 10510080.

The previous prime is 25641739. The next prime is 25641751. The reversal of 25641742 is 24714652.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 55392 + ... + 55852.

It is an arithmetic number, because the mean of its divisors is an integer number (1434510).

Almost surely, 2^25641742 is an apocalyptic number.

25641742 is a deficient number, since it is larger than the sum of its proper divisors (20262578).

25641742 is a wasteful number, since it uses less digits than its factorization.

25641742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636.

The product of its digits is 13440, while the sum is 31.

The square root of 25641742 is about 5063.7675697054. The cubic root of 25641742 is about 294.8826192009.

The spelling of 25641742 in words is "twenty-five million, six hundred forty-one thousand, seven hundred forty-two".