2000621 has 6 divisors (see below), whose sum is σ = 2327310. Its totient is φ = 1714776.

The previous prime is 2000597. The next prime is 2000629. The reversal of 2000621 is 1260002.

It can be written as a sum of positive squares in only one way, i.e., 1999396 + 1225 = 1414^2 + 35^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2000621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20366 + ... + 20463.

It is an arithmetic number, because the mean of its divisors is an integer number (387885).

2^2000621 is an apocalyptic number.

It is an amenable number.

2000621 is a deficient number, since it is larger than the sum of its proper divisors (326689).

2000621 is an equidigital number, since it uses as much as digits as its factorization.

2000621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40843 (or 40836 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2000621 is about 1414.4331019882. The cubic root of 2000621 is about 126.0051438229.

Adding to 2000621 its reverse (1260002), we get a palindrome (3260623).

The spelling of 2000621 in words is "two million, six hundred twenty-one", and thus it is an aban number.