25910591 has 4 divisors (see below), whose sum is σ = 29612112. Its totient is φ = 22209072.

The previous prime is 25910579. The next prime is 25910597. The reversal of 25910591 is 19501952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25910591 - 2²² = 21716287 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 (25910597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1850750 + ... + 1850763.

It is an arithmetic number, because the mean of its divisors is an integer number (7403028).

Almost surely, 2^25910591 is an apocalyptic number.

25910591 is a deficient number, since it is larger than the sum of its proper divisors (3701521).

25910591 is an equidigital number, since it uses as much as digits as its factorization.

25910591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701520.

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 25910591 is about 5090.2446895999. The cubic root of 25910591 is about 295.9096350343.

The spelling of 25910591 in words is "twenty-five million, nine hundred ten thousand, five hundred ninety-one".