120745621 has 2 divisors, whose sum is σ = 120745622. Its totient is φ = 120745620.

The previous prime is 120745553. The next prime is 120745637. The reversal of 120745621 is 126547021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77000625 + 43744996 = 8775^2 + 6614^2 .

It is a cyclic number.

It is not a de Polignac number, because 120745621 - 2⁹ = 120745109 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120745621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120745721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60372810 + 60372811.

It is an arithmetic number, because the mean of its divisors is an integer number (60372811).

Almost surely, 2^120745621 is an apocalyptic number.

It is an amenable number.

120745621 is a deficient number, since it is larger than the sum of its proper divisors (1).

120745621 is an equidigital number, since it uses as much as digits as its factorization.

120745621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 120745621 is about 10988.4312347123. The cubic root of 120745621 is about 494.2618948751.

The spelling of 120745621 in words is "one hundred twenty million, seven hundred forty-five thousand, six hundred twenty-one".