25525591 has 12 divisors (see below), whose sum is σ = 31590192. Its totient is φ = 20195136.

The previous prime is 25525589. The next prime is 25525609. The reversal of 25525591 is 19552552.

It is a happy number.

It is not a de Polignac number, because 25525591 - 2¹ = 25525589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25525541) 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, 9606 + ... + 11971.

It is an arithmetic number, because the mean of its divisors is an integer number (2632516).

Almost surely, 2^25525591 is an apocalyptic number.

25525591 is a deficient number, since it is larger than the sum of its proper divisors (6064601).

25525591 is a wasteful number, since it uses less digits than its factorization.

25525591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21610 (or 21597 counting only the distinct ones).

The product of its digits is 22500, while the sum is 34.

The square root of 25525591 is about 5052.2857203448. The cubic root of 25525591 is about 294.4366958076.

The spelling of 25525591 in words is "twenty-five million, five hundred twenty-five thousand, five hundred ninety-one".