25856742 has 8 divisors (see below), whose sum is σ = 51713496. Its totient is φ = 8618912.

The previous prime is 25856737. The next prime is 25856767. The reversal of 25856742 is 24765852.

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

25856742 is an admirable number.

It is a super-2 number, since 2×25856742² = 1337142213709128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25856742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2154723 + ... + 2154734.

It is an arithmetic number, because the mean of its divisors is an integer number (6464187).

Almost surely, 2^25856742 is an apocalyptic number.

25856742 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.

25856742 is a wasteful number, since it uses less digits than its factorization.

25856742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309462.

The product of its digits is 134400, while the sum is 39.

The square root of 25856742 is about 5084.9525071528. The cubic root of 25856742 is about 295.7045002646.

The spelling of 25856742 in words is "twenty-five million, eight hundred fifty-six thousand, seven hundred forty-two".