264242591 has 2 divisors, whose sum is σ = 264242592. Its totient is φ = 264242590.

The previous prime is 264242549. The next prime is 264242609. The reversal of 264242591 is 195242462.

264242591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 264242591 - 2⁶ = 264242527 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264242501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132121295 + 132121296.

It is an arithmetic number, because the mean of its divisors is an integer number (132121296).

Almost surely, 2^264242591 is an apocalyptic number.

264242591 is a deficient number, since it is larger than the sum of its proper divisors (1).

264242591 is an equidigital number, since it uses as much as digits as its factorization.

264242591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The square root of 264242591 is about 16255.5403170734. The cubic root of 264242591 is about 641.7033005302.

The spelling of 264242591 in words is "two hundred sixty-four million, two hundred forty-two thousand, five hundred ninety-one".