564321 has 4 divisors (see below), whose sum is σ = 752432. Its totient is φ = 376212.

The previous prime is 564313. The next prime is 564323. The reversal of 564321 is 123465.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 564321 - 2³ = 564313 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 564321.

It is not an unprimeable number, because it can be changed into a prime (564323) 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, 94051 + ... + 94056.

It is an arithmetic number, because the mean of its divisors is an integer number (188108).

2⁵⁶⁴³²¹ is an apocalyptic number.

It is an amenable number.

564321 is a deficient number, since it is larger than the sum of its proper divisors (188111).

564321 is a wasteful number, since it uses less digits than its factorization.

564321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188110.

The product of its digits is 720, while the sum is 21.

The square root of 564321 is about 751.2130190565. The cubic root of 564321 is about 82.6371639287.

Adding to 564321 its reverse (123465), we get a palindrome (687786).

The spelling of 564321 in words is "five hundred sixty-four thousand, three hundred twenty-one".