5664321 has 12 divisors (see below), whose sum is σ = 8811348. Its totient is φ = 3485664.

The previous prime is 5664313. The next prime is 5664359. The reversal of 5664321 is 1234665.

It can be written as a sum of positive squares in 2 ways, for example, as 1404225 + 4260096 = 1185^2 + 2064^2 .

It is not a de Polignac number, because 5664321 - 2³ = 5664313 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5664301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24090 + ... + 24323.

It is an arithmetic number, because the mean of its divisors is an integer number (734279).

Almost surely, 2^5664321 is an apocalyptic number.

It is an amenable number.

5664321 is a deficient number, since it is larger than the sum of its proper divisors (3147027).

5664321 is a wasteful number, since it uses less digits than its factorization.

5664321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48432 (or 48429 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 5664321 is about 2379.9834033035. The cubic root of 5664321 is about 178.2581051283.

Adding to 5664321 its reverse (1234665), we get a palindrome (6898986).

The spelling of 5664321 in words is "five million, six hundred sixty-four thousand, three hundred twenty-one".