5664521 has 4 divisors (see below), whose sum is σ = 5757444. Its totient is φ = 5571600.

The previous prime is 5664511. The next prime is 5664523. The reversal of 5664521 is 1254665.

5664521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 193600 + 5470921 = 440^2 + 2339^2 .

It is a cyclic number.

It is not a de Polignac number, because 5664521 - 2¹⁸ = 5402377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5664523) 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, 46370 + ... + 46491.

It is an arithmetic number, because the mean of its divisors is an integer number (1439361).

Almost surely, 2^5664521 is an apocalyptic number.

It is an amenable number.

5664521 is a deficient number, since it is larger than the sum of its proper divisors (92923).

5664521 is an equidigital number, since it uses as much as digits as its factorization.

5664521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92922.

The product of its digits is 7200, while the sum is 29.

The square root of 5664521 is about 2380.0254200323. The cubic root of 5664521 is about 178.2602031263.

The spelling of 5664521 in words is "five million, six hundred sixty-four thousand, five hundred twenty-one".