264515 has 4 divisors (see below), whose sum is σ = 317424. Its totient is φ = 211608.

The previous prime is 264487. The next prime is 264527. The reversal of 264515 is 515462.

264515 = 79² + 80² + ... + 108².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 515462 = 2 ⋅257731.

It is a cyclic number.

It is not a de Polignac number, because 264515 - 2¹⁰ = 263491 is a prime.

It is a d-powerful number, because it can be written as 2¹⁸ + 6⁴ + 5² + 4⁵ + 1 + 5² .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26447 + ... + 26456.

It is an arithmetic number, because the mean of its divisors is an integer number (79356).

2²⁶⁴⁵¹⁵ is an apocalyptic number.

264515 is a deficient number, since it is larger than the sum of its proper divisors (52909).

264515 is an equidigital number, since it uses as much as digits as its factorization.

264515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52908.

The product of its digits is 1200, while the sum is 23.

The square root of 264515 is about 514.3102176702. The cubic root of 264515 is about 64.1923736505.

Adding to 264515 its reverse (515462), we get a palindrome (779977).

The spelling of 264515 in words is "two hundred sixty-four thousand, five hundred fifteen".