264505 has 4 divisors (see below), whose sum is σ = 317412. Its totient is φ = 211600.

The previous prime is 264487. The next prime is 264527. The reversal of 264505 is 505462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505462 = 2 ⋅252731.

It can be written as a sum of positive squares in 2 ways, for example, as 210681 + 53824 = 459^2 + 232^2 .

It is not a de Polignac number, because 264505 - 2¹³ = 256313 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26446 + ... + 26455.

It is an arithmetic number, because the mean of its divisors is an integer number (79353).

2²⁶⁴⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

264505 is a deficient number, since it is larger than the sum of its proper divisors (52907).

264505 is an equidigital number, since it uses as much as digits as its factorization.

264505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52906.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 264505 is about 514.3004958193. The cubic root of 264505 is about 64.1915647086.

Adding to 264505 its reverse (505462), we get a palindrome (769967).

The spelling of 264505 in words is "two hundred sixty-four thousand, five hundred five".