120191857 has 2 divisors, whose sum is σ = 120191858. Its totient is φ = 120191856.

The previous prime is 120191839. The next prime is 120191861. The reversal of 120191857 is 758191021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68409441 + 51782416 = 8271^2 + 7196^2 .

It is a cyclic number.

It is not a de Polignac number, because 120191857 - 2¹⁵ = 120159089 is a prime.

It is not a weakly prime, because it can be changed into another prime (120191257) 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 as a sum of consecutive naturals, namely, 60095928 + 60095929.

It is an arithmetic number, because the mean of its divisors is an integer number (60095929).

Almost surely, 2^120191857 is an apocalyptic number.

It is an amenable number.

120191857 is a deficient number, since it is larger than the sum of its proper divisors (1).

120191857 is an equidigital number, since it uses as much as digits as its factorization.

120191857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 120191857 is about 10963.2046865869. The cubic root of 120191857 is about 493.5051415937.

The spelling of 120191857 in words is "one hundred twenty million, one hundred ninety-one thousand, eight hundred fifty-seven".