25366591 has 2 divisors, whose sum is σ = 25366592. Its totient is φ = 25366590.

The previous prime is 25366573. The next prime is 25366609. The reversal of 25366591 is 19566352.

It is a balanced prime because it is at equal distance from previous prime (25366573) and next prime (25366609).

It is a cyclic number.

It is not a de Polignac number, because 25366591 - 2¹¹ = 25364543 is a prime.

It is a super-2 number, since 2×25366591² = 1286927877922562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25366591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25366541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12683295 + 12683296.

It is an arithmetic number, because the mean of its divisors is an integer number (12683296).

Almost surely, 2^25366591 is an apocalyptic number.

25366591 is a deficient number, since it is larger than the sum of its proper divisors (1).

25366591 is an equidigital number, since it uses as much as digits as its factorization.

25366591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 37.

The square root of 25366591 is about 5036.5256874159. The cubic root of 25366591 is about 293.8240690841.

The spelling of 25366591 in words is "twenty-five million, three hundred sixty-six thousand, five hundred ninety-one".