5643021 has 8 divisors (see below), whose sum is σ = 7574464. Its totient is φ = 3736800.

The previous prime is 5642999. The next prime is 5643041. The reversal of 5643021 is 1203465.

It is a happy number.

5643021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 5643021 - 2⁹ = 5642509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5643041) 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 7 ways as a sum of consecutive naturals, for example, 5776 + ... + 6681.

It is an arithmetic number, because the mean of its divisors is an integer number (946808).

Almost surely, 2^5643021 is an apocalyptic number.

It is an amenable number.

5643021 is a deficient number, since it is larger than the sum of its proper divisors (1931443).

5643021 is a wasteful number, since it uses less digits than its factorization.

5643021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12611.

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

The square root of 5643021 is about 2375.5043674976. The cubic root of 5643021 is about 178.0343850586.

Adding to 5643021 its reverse (1203465), we get a palindrome (6846486).

It can be divided in two parts, 56430 and 21, that multiplied together give a triangular number (1185030 = T₁₅₃₉).

The spelling of 5643021 in words is "five million, six hundred forty-three thousand, twenty-one".