5620621 has 4 divisors (see below), whose sum is σ = 5628700. Its totient is φ = 5612544.

The previous prime is 5620609. The next prime is 5620627. The reversal of 5620621 is 1260265.

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 2340900 + 3279721 = 1530^2 + 1811^2 .

It is a cyclic number.

It is not a de Polignac number, because 5620621 - 2⁷ = 5620493 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5620592 and 5620601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5620627) 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, 2886 + ... + 4423.

It is an arithmetic number, because the mean of its divisors is an integer number (1407175).

Almost surely, 2^5620621 is an apocalyptic number.

It is an amenable number.

5620621 is a deficient number, since it is larger than the sum of its proper divisors (8079).

5620621 is an equidigital number, since it uses as much as digits as its factorization.

5620621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8078.

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

The square root of 5620621 is about 2370.7848911278. The cubic root of 5620621 is about 177.7985032116.

Adding to 5620621 its reverse (1260265), we get a palindrome (6880886).

It can be divided in two parts, 5620 and 621, that added together give a square (6241 = 79²).

The spelling of 5620621 in words is "five million, six hundred twenty thousand, six hundred twenty-one".