120129857 has 2 divisors, whose sum is σ = 120129858. Its totient is φ = 120129856.

The previous prime is 120129833. The next prime is 120129869. The reversal of 120129857 is 758921021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75186241 + 44943616 = 8671^2 + 6704^2 .

It is a cyclic number.

It is not a de Polignac number, because 120129857 - 2⁸ = 120129601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120129817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60064928 + 60064929.

It is an arithmetic number, because the mean of its divisors is an integer number (60064929).

Almost surely, 2^120129857 is an apocalyptic number.

It is an amenable number.

120129857 is a deficient number, since it is larger than the sum of its proper divisors (1).

120129857 is an equidigital number, since it uses as much as digits as its factorization.

120129857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 120129857 is about 10960.3766814832. The cubic root of 120129857 is about 493.4202701163.

The spelling of 120129857 in words is "one hundred twenty million, one hundred twenty-nine thousand, eight hundred fifty-seven".