120556217 has 4 divisors (see below), whose sum is σ = 120991716. Its totient is φ = 120120720.

The previous prime is 120556201. The next prime is 120556223. The reversal of 120556217 is 712655021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16128256 + 104427961 = 4016^2 + 10219^2 .

It is a cyclic number.

It is not a de Polignac number, because 120556217 - 2⁴ = 120556201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120556217.

It is not an unprimeable number, because it can be changed into a prime (120556417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217334 + ... + 217887.

It is an arithmetic number, because the mean of its divisors is an integer number (30247929).

Almost surely, 2^120556217 is an apocalyptic number.

It is an amenable number.

120556217 is a deficient number, since it is larger than the sum of its proper divisors (435499).

120556217 is an equidigital number, since it uses as much as digits as its factorization.

120556217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435498.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 120556217 is about 10979.8095156519. The cubic root of 120556217 is about 494.0033232578.

The spelling of 120556217 in words is "one hundred twenty million, five hundred fifty-six thousand, two hundred seventeen".