122142187 has 2 divisors, whose sum is σ = 122142188. Its totient is φ = 122142186.

The previous prime is 122142179. The next prime is 122142221. The reversal of 122142187 is 781241221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122142187 - 2³ = 122142179 is a prime.

It is not a weakly prime, because it can be changed into another prime (122149187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61071093 + 61071094.

It is an arithmetic number, because the mean of its divisors is an integer number (61071094).

Almost surely, 2^122142187 is an apocalyptic number.

122142187 is a deficient number, since it is larger than the sum of its proper divisors (1).

122142187 is an equidigital number, since it uses as much as digits as its factorization.

122142187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1792, while the sum is 28.

The square root of 122142187 is about 11051.7956459573. The cubic root of 122142187 is about 496.1601695585.

The spelling of 122142187 in words is "one hundred twenty-two million, one hundred forty-two thousand, one hundred eighty-seven".