25855407 has 6 divisors (see below), whose sum is σ = 37346712. Its totient is φ = 17236932.

The previous prime is 25855397. The next prime is 25855411. The reversal of 25855407 is 70455852.

It is a happy number.

It is not a de Polignac number, because 25855407 - 2⁴ = 25855391 is a prime.

It is a super-2 number, since 2×25855407² = 1337004142271298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25855007) 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 5 ways as a sum of consecutive naturals, for example, 1436403 + ... + 1436420.

It is an arithmetic number, because the mean of its divisors is an integer number (6224452).

Almost surely, 2^25855407 is an apocalyptic number.

25855407 is a deficient number, since it is larger than the sum of its proper divisors (11491305).

25855407 is a wasteful number, since it uses less digits than its factorization.

25855407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2872829 (or 2872826 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 25855407 is about 5084.8212357958. The cubic root of 25855407 is about 295.6994110400.

It can be divided in two parts, 25855 and 407, that added together give a palindrome (26262).

The spelling of 25855407 in words is "twenty-five million, eight hundred fifty-five thousand, four hundred seven".