120240621 has 12 divisors (see below), whose sum is σ = 174183100. Its totient is φ = 79928640.

The previous prime is 120240613. The next prime is 120240629. The reversal of 120240621 is 126042021.

120240621 is a `hidden beast` number, since 1 + 2 + 0 + 2 + 40 + 621 = 666.

It is an interprime number because it is at equal distance from previous prime (120240613) and next prime (120240629).

It can be written as a sum of positive squares in 2 ways, for example, as 105884100 + 14356521 = 10290^2 + 3789^2 .

It is not a de Polignac number, because 120240621 - 2³ = 120240613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120240594 and 120240603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120240629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16000 + ... + 22281.

Almost surely, 2^120240621 is an apocalyptic number.

It is an amenable number.

120240621 is a deficient number, since it is larger than the sum of its proper divisors (53942479).

120240621 is a wasteful number, since it uses less digits than its factorization.

120240621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38636 (or 38633 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 120240621 is about 10965.4284458018. The cubic root of 120240621 is about 493.5718738762.

Adding to 120240621 its reverse (126042021), we get a palindrome (246282642).

The spelling of 120240621 in words is "one hundred twenty million, two hundred forty thousand, six hundred twenty-one".