5664021 has 8 divisors (see below), whose sum is σ = 8238624. Its totient is φ = 3432720.

The previous prime is 5664013. The next prime is 5664031. The reversal of 5664021 is 1204665.

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

It is not a de Polignac number, because 5664021 - 2³ = 5664013 is a prime.

It is a super-2 number, since 2×5664021² = 64162267776882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5663982 and 5664000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5664011) 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, 85786 + ... + 85851.

It is an arithmetic number, because the mean of its divisors is an integer number (1029828).

Almost surely, 2^5664021 is an apocalyptic number.

It is an amenable number.

5664021 is a deficient number, since it is larger than the sum of its proper divisors (2574603).

5664021 is a wasteful number, since it uses less digits than its factorization.

5664021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171651.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 5664021 is about 2379.9203768194. The cubic root of 5664021 is about 178.2549580388.

Adding to 5664021 its reverse (1204665), we get a palindrome (6868686).

The spelling of 5664021 in words is "five million, six hundred sixty-four thousand, twenty-one".