25582591 has 2 divisors, whose sum is σ = 25582592. Its totient is φ = 25582590.

The previous prime is 25582589. The next prime is 25582619. The reversal of 25582591 is 19528552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25582591 - 2¹ = 25582589 is a prime.

Together with 25582589, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 25582591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25582561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12791295 + 12791296.

It is an arithmetic number, because the mean of its divisors is an integer number (12791296).

Almost surely, 2^25582591 is an apocalyptic number.

25582591 is a deficient number, since it is larger than the sum of its proper divisors (1).

25582591 is an equidigital number, since it uses as much as digits as its factorization.

25582591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 37.

The square root of 25582591 is about 5057.9235858206. The cubic root of 25582591 is about 294.6556971329.

The spelling of 25582591 in words is "twenty-five million, five hundred eighty-two thousand, five hundred ninety-one".