122125639 has 2 divisors, whose sum is σ = 122125640. Its totient is φ = 122125638.

The previous prime is 122125579. The next prime is 122125643. The reversal of 122125639 is 936521221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122125639 - 2¹¹ = 122123591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122125639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122125649) 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, 61062819 + 61062820.

It is an arithmetic number, because the mean of its divisors is an integer number (61062820).

Almost surely, 2^122125639 is an apocalyptic number.

122125639 is a deficient number, since it is larger than the sum of its proper divisors (1).

122125639 is an equidigital number, since it uses as much as digits as its factorization.

122125639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 122125639 is about 11051.0469639759. The cubic root of 122125639 is about 496.1377617143.

The spelling of 122125639 in words is "one hundred twenty-two million, one hundred twenty-five thousand, six hundred thirty-nine".