264239 has 4 divisors (see below), whose sum is σ = 266280. Its totient is φ = 262200.

The previous prime is 264221. The next prime is 264263. The reversal of 264239 is 932462.

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 264239 - 2⁸ = 263983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264269) by changing a digit.

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, 812 + ... + 1089.

It is an arithmetic number, because the mean of its divisors is an integer number (66570).

2²⁶⁴²³⁹ is an apocalyptic number.

264239 is a deficient number, since it is larger than the sum of its proper divisors (2041).

264239 is a wasteful number, since it uses less digits than its factorization.

264239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040.

The product of its digits is 2592, while the sum is 26.

The square root of 264239 is about 514.0418270919. The cubic root of 264239 is about 64.1700393647.

The spelling of 264239 in words is "two hundred sixty-four thousand, two hundred thirty-nine".