264565 has 8 divisors (see below), whose sum is σ = 362880. Its totient is φ = 181392.

The previous prime is 264559. The next prime is 264577. The reversal of 264565 is 565462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 264565 - 2⁷ = 264437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3745 + ... + 3814.

It is an arithmetic number, because the mean of its divisors is an integer number (45360).

2²⁶⁴⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

264565 is a deficient number, since it is larger than the sum of its proper divisors (98315).

264565 is an equidigital number, since it uses as much as digits as its factorization.

264565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7571.

The product of its digits is 7200, while the sum is 28.

The square root of 264565 is about 514.3588241685. The cubic root of 264565 is about 64.1964180544.

The spelling of 264565 in words is "two hundred sixty-four thousand, five hundred sixty-five".