120342139 has 2 divisors, whose sum is σ = 120342140. Its totient is φ = 120342138.

The previous prime is 120342121. The next prime is 120342161. The reversal of 120342139 is 931243021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 120342139 - 2⁵ = 120342107 is a prime.

It is not a weakly prime, because it can be changed into another prime (120342119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60171069 + 60171070.

It is an arithmetic number, because the mean of its divisors is an integer number (60171070).

Almost surely, 2^120342139 is an apocalyptic number.

120342139 is a deficient number, since it is larger than the sum of its proper divisors (1).

120342139 is an equidigital number, since it uses as much as digits as its factorization.

120342139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 120342139 is about 10970.0564720515. The cubic root of 120342139 is about 493.7107407977.

The spelling of 120342139 in words is "one hundred twenty million, three hundred forty-two thousand, one hundred thirty-nine".