264345257 has 16 divisors (see below), whose sum is σ = 306700992. Its totient is φ = 225169920.

The previous prime is 264345253. The next prime is 264345259. The reversal of 264345257 is 752543462.

It is a cyclic number.

It is not a de Polignac number, because 264345257 - 2² = 264345253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 264345257.

It is not an unprimeable number, because it can be changed into a prime (264345253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40538 + ... + 46604.

It is an arithmetic number, because the mean of its divisors is an integer number (19168812).

Almost surely, 2^264345257 is an apocalyptic number.

It is an amenable number.

264345257 is a deficient number, since it is larger than the sum of its proper divisors (42355735).

264345257 is a wasteful number, since it uses less digits than its factorization.

264345257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6328.

The product of its digits is 201600, while the sum is 38.

The square root of 264345257 is about 16258.6978875924. The cubic root of 264345257 is about 641.7863966231.

The spelling of 264345257 in words is "two hundred sixty-four million, three hundred forty-five thousand, two hundred fifty-seven".