5662021 has 4 divisors (see below), whose sum is σ = 5672044. Its totient is φ = 5652000.

The previous prime is 5661991. The next prime is 5662039. The reversal of 5662021 is 1202665.

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 3381921 + 2280100 = 1839^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 5662021 - 2⁷ = 5661893 is a prime.

It is the 2380-th Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5661983 and 5662001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5662051) by changing a digit.

It is a nontrivial repunit in base 2379.

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 3 ways as a sum of consecutive naturals, for example, 4110 + ... + 5311.

It is an arithmetic number, because the mean of its divisors is an integer number (1418011).

Almost surely, 2^5662021 is an apocalyptic number.

It is an amenable number.

5662021 is a deficient number, since it is larger than the sum of its proper divisors (10023).

5662021 is an equidigital number, since it uses as much as digits as its factorization.

5662021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10022.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 5662021 is about 2379.5001575961. The cubic root of 5662021 is about 178.2339746016.

Adding to 5662021 its reverse (1202665), we get a palindrome (6864686).

The spelling of 5662021 in words is "five million, six hundred sixty-two thousand, twenty-one".