25082991 has 12 divisors (see below), whose sum is σ = 36772632. Its totient is φ = 16472016.

The previous prime is 25082989. The next prime is 25083001. The reversal of 25082991 is 19928052.

It is not a de Polignac number, because 25082991 - 2¹ = 25082989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25082921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20196 + ... + 21401.

It is an arithmetic number, because the mean of its divisors is an integer number (3064386).

Almost surely, 2^25082991 is an apocalyptic number.

25082991 is a deficient number, since it is larger than the sum of its proper divisors (11689641).

25082991 is a wasteful number, since it uses less digits than its factorization.

25082991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41670 (or 41667 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 25082991 is about 5008.2922239023. The cubic root of 25082991 is about 292.7249726582.

The spelling of 25082991 in words is "twenty-five million, eighty-two thousand, nine hundred ninety-one".