120615621 has 8 divisors (see below), whose sum is σ = 183795264. Its totient is φ = 68923200.

The previous prime is 120615619. The next prime is 120615631. The reversal of 120615621 is 126516021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120615621 - 2¹ = 120615619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120615591 and 120615600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120615631) 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 7 ways as a sum of consecutive naturals, for example, 2871780 + ... + 2871821.

It is an arithmetic number, because the mean of its divisors is an integer number (22974408).

Almost surely, 2^120615621 is an apocalyptic number.

It is an amenable number.

120615621 is a deficient number, since it is larger than the sum of its proper divisors (63179643).

120615621 is an equidigital number, since it uses as much as digits as its factorization.

120615621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5743611.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 120615621 is about 10982.5143296059. The cubic root of 120615621 is about 494.0844498764.

The spelling of 120615621 in words is "one hundred twenty million, six hundred fifteen thousand, six hundred twenty-one".