25573591 has 2 divisors, whose sum is σ = 25573592. Its totient is φ = 25573590.

The previous prime is 25573589. The next prime is 25573607. The reversal of 25573591 is 19537552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25573591 - 2¹ = 25573589 is a prime.

Together with 25573589, 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 25573591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25573501) by changing a digit.

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 as a sum of consecutive naturals, namely, 12786795 + 12786796.

It is an arithmetic number, because the mean of its divisors is an integer number (12786796).

Almost surely, 2^25573591 is an apocalyptic number.

25573591 is a deficient number, since it is larger than the sum of its proper divisors (1).

25573591 is an equidigital number, since it uses as much as digits as its factorization.

25573591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47250, while the sum is 37.

The square root of 25573591 is about 5057.0338144015. The cubic root of 25573591 is about 294.6211396179.

The spelling of 25573591 in words is "twenty-five million, five hundred seventy-three thousand, five hundred ninety-one".