120640621 has 2 divisors, whose sum is σ = 120640622. Its totient is φ = 120640620.

The previous prime is 120640613. The next prime is 120640631. The reversal of 120640621 is 126046021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119115396 + 1525225 = 10914^2 + 1235^2 .

It is a cyclic number.

It is not a de Polignac number, because 120640621 - 2³ = 120640613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120640592 and 120640601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120640601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60320310 + 60320311.

It is an arithmetic number, because the mean of its divisors is an integer number (60320311).

Almost surely, 2^120640621 is an apocalyptic number.

It is an amenable number.

120640621 is a deficient number, since it is larger than the sum of its proper divisors (1).

120640621 is an equidigital number, since it uses as much as digits as its factorization.

120640621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 120640621 is about 10983.6524435180. The cubic root of 120640621 is about 494.1185838131.

Adding to 120640621 its reverse (126046021), we get a palindrome (246686642).

The spelling of 120640621 in words is "one hundred twenty million, six hundred forty thousand, six hundred twenty-one".