5642021 has 16 divisors (see below), whose sum is σ = 7188480. Its totient is φ = 4300080.

The previous prime is 5642017. The next prime is 5642027. The reversal of 5642021 is 1202465.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 5642021 - 2² = 5642017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5641984 and 5642002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5642027) 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 15 ways as a sum of consecutive naturals, for example, 2840 + ... + 4398.

It is an arithmetic number, because the mean of its divisors is an integer number (449280).

Almost surely, 2^5642021 is an apocalyptic number.

It is an amenable number.

5642021 is a deficient number, since it is larger than the sum of its proper divisors (1546459).

5642021 is a wasteful number, since it uses less digits than its factorization.

5642021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 5642021 is about 2375.2938765551. The cubic root of 5642021 is about 178.0238679436.

Adding to 5642021 its reverse (1202465), we get a palindrome (6844486).

The spelling of 5642021 in words is "five million, six hundred forty-two thousand, twenty-one".