264243 has 8 divisors (see below), whose sum is σ = 402688. Its totient is φ = 150984.

The previous prime is 264221. The next prime is 264263. The reversal of 264243 is 342462.

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

It is not a de Polignac number, because 264243 - 2⁵ = 264211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 12583 = 264243 / (2 + 6 + 4 + 2 + 4 + 3).

It is a d-powerful number, because it can be written as 2⁵ + 6 + 2¹¹ + 4 + 4⁹ + 3² .

It is a Duffinian number.

264243 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (264263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6271 + ... + 6312.

It is an arithmetic number, because the mean of its divisors is an integer number (50336).

2²⁶⁴²⁴³ is an apocalyptic number.

264243 is a deficient number, since it is larger than the sum of its proper divisors (138445).

264243 is a wasteful number, since it uses less digits than its factorization.

264243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12593.

The product of its digits is 1152, while the sum is 21.

The square root of 264243 is about 514.0457178112. The cubic root of 264243 is about 64.1703631610.

The spelling of 264243 in words is "two hundred sixty-four thousand, two hundred forty-three".