264539 has 4 divisors (see below), whose sum is σ = 288600. Its totient is φ = 240480.

The previous prime is 264529. The next prime is 264553. The reversal of 264539 is 935462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 264539 - 2⁸ = 264283 is a prime.

It is a d-powerful number, because it can be written as 2 + 6⁴ + 5³ + 4⁹ + 3⁵ + 9³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12014 + ... + 12035.

It is an arithmetic number, because the mean of its divisors is an integer number (72150).

2²⁶⁴⁵³⁹ is an apocalyptic number.

264539 is a deficient number, since it is larger than the sum of its proper divisors (24061).

264539 is a wasteful number, since it uses less digits than its factorization.

264539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24060.

The product of its digits is 6480, while the sum is 29.

The square root of 264539 is about 514.3335493627. Note that the first 3 decimals coincide. The cubic root of 264539 is about 64.1943150280.

It can be divided in two parts, 26453 and 9, that added together give a palindrome (26462).

The spelling of 264539 in words is "two hundred sixty-four thousand, five hundred thirty-nine".