120857117 has 2 divisors, whose sum is σ = 120857118. Its totient is φ = 120857116.

The previous prime is 120857101. The next prime is 120857147. The reversal of 120857117 is 711758021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98823481 + 22033636 = 9941^2 + 4694^2 .

It is a cyclic number.

It is not a de Polignac number, because 120857117 - 2⁴ = 120857101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120857147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60428558 + 60428559.

It is an arithmetic number, because the mean of its divisors is an integer number (60428559).

Almost surely, 2^120857117 is an apocalyptic number.

It is an amenable number.

120857117 is a deficient number, since it is larger than the sum of its proper divisors (1).

120857117 is an equidigital number, since it uses as much as digits as its factorization.

120857117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920, while the sum is 32.

The square root of 120857117 is about 10993.5033997357. The cubic root of 120857117 is about 494.4139811930.

The spelling of 120857117 in words is "one hundred twenty million, eight hundred fifty-seven thousand, one hundred seventeen".