264595421 has 2 divisors, whose sum is σ = 264595422. Its totient is φ = 264595420.

The previous prime is 264595403. The next prime is 264595433. The reversal of 264595421 is 124595462.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 258888100 + 5707321 = 16090^2 + 2389^2 .

It is a cyclic number.

It is not a de Polignac number, because 264595421 - 2²⁶ = 197486557 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264595321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132297710 + 132297711.

It is an arithmetic number, because the mean of its divisors is an integer number (132297711).

Almost surely, 2^264595421 is an apocalyptic number.

It is an amenable number.

264595421 is a deficient number, since it is larger than the sum of its proper divisors (1).

264595421 is an equidigital number, since it uses as much as digits as its factorization.

264595421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 38.

The square root of 264595421 is about 16266.3893043293. The cubic root of 264595421 is about 641.9887850126.

The spelling of 264595421 in words is "two hundred sixty-four million, five hundred ninety-five thousand, four hundred twenty-one".