264445 has 4 divisors (see below), whose sum is σ = 317340. Its totient is φ = 211552.

The previous prime is 264443. The next prime is 264463. The reversal of 264445 is 544462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544462 = 2 ⋅272231.

It can be written as a sum of positive squares in 2 ways, for example, as 139129 + 125316 = 373^2 + 354^2 .

It is a cyclic number.

It is not a de Polignac number, because 264445 - 2¹ = 264443 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹¹ + 6³ + 4² + 4² + 4⁹ + 5 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264443) 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, 26440 + ... + 26449.

It is an arithmetic number, because the mean of its divisors is an integer number (79335).

2²⁶⁴⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

264445 is a deficient number, since it is larger than the sum of its proper divisors (52895).

264445 is an equidigital number, since it uses as much as digits as its factorization.

264445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52894.

The product of its digits is 3840, while the sum is 25.

The square root of 264445 is about 514.2421608542. The cubic root of 264445 is about 64.1867106288.

The spelling of 264445 in words is "two hundred sixty-four thousand, four hundred forty-five".