2020621 has 2 divisors, whose sum is σ = 2020622. Its totient is φ = 2020620.

The previous prime is 2020609. The next prime is 2020657. The reversal of 2020621 is 1260202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1550025 + 470596 = 1245^2 + 686^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020621 - 2⁷ = 2020493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2020661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010310 + 1010311.

It is an arithmetic number, because the mean of its divisors is an integer number (1010311).

2^2020621 is an apocalyptic number.

It is an amenable number.

2020621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020621 is an equidigital number, since it uses as much as digits as its factorization.

2020621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2020621 is about 1421.4854906048. The cubic root of 2020621 is about 126.4236391255.

Adding to 2020621 its reverse (1260202), we get a palindrome (3280823).

The spelling of 2020621 in words is "two million, twenty thousand, six hundred twenty-one".