122280139 has 2 divisors, whose sum is σ = 122280140. Its totient is φ = 122280138.

The previous prime is 122280077. The next prime is 122280187. The reversal of 122280139 is 931082221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122280139 - 2⁹ = 122279627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122280839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61140069 + 61140070.

It is an arithmetic number, because the mean of its divisors is an integer number (61140070).

Almost surely, 2^122280139 is an apocalyptic number.

122280139 is a deficient number, since it is larger than the sum of its proper divisors (1).

122280139 is an equidigital number, since it uses as much as digits as its factorization.

122280139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 122280139 is about 11058.0350424476. The cubic root of 122280139 is about 496.3468932913.

The spelling of 122280139 in words is "one hundred twenty-two million, two hundred eighty thousand, one hundred thirty-nine".