264881257 has 2 divisors, whose sum is σ = 264881258. Its totient is φ = 264881256.

The previous prime is 264881249. The next prime is 264881263. The reversal of 264881257 is 752188462.

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., 200817241 + 64064016 = 14171^2 + 8004^2 .

It is a cyclic number.

It is not a de Polignac number, because 264881257 - 2³ = 264881249 is a prime.

It is not a weakly prime, because it can be changed into another prime (264881207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132440628 + 132440629.

It is an arithmetic number, because the mean of its divisors is an integer number (132440629).

Almost surely, 2^264881257 is an apocalyptic number.

It is an amenable number.

264881257 is a deficient number, since it is larger than the sum of its proper divisors (1).

264881257 is an equidigital number, since it uses as much as digits as its factorization.

264881257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 43.

The square root of 264881257 is about 16275.1730251939. The cubic root of 264881257 is about 642.2198767767.

The spelling of 264881257 in words is "two hundred sixty-four million, eight hundred eighty-one thousand, two hundred fifty-seven".