25979995 has 32 divisors (see below), whose sum is σ = 35054208. Its totient is φ = 18382848.

The previous prime is 25979981. The next prime is 25980013. The reversal of 25979995 is 59997952.

It is not a de Polignac number, because 25979995 - 2⁵ = 25979963 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 189567 + ... + 189703.

It is an arithmetic number, because the mean of its divisors is an integer number (1095444).

Almost surely, 2^25979995 is an apocalyptic number.

25979995 is a deficient number, since it is larger than the sum of its proper divisors (9074213).

25979995 is a wasteful number, since it uses less digits than its factorization.

25979995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279.

The product of its digits is 2296350, while the sum is 55.

The square root of 25979995 is about 5097.0574844708. The cubic root of 25979995 is about 296.1736069174.

The spelling of 25979995 in words is "twenty-five million, nine hundred seventy-nine thousand, nine hundred ninety-five".