122572139 has 2 divisors, whose sum is σ = 122572140. Its totient is φ = 122572138.

The previous prime is 122572127. The next prime is 122572141. The reversal of 122572139 is 931275221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122572139 - 2⁴ = 122572123 is a prime.

Together with 122572141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122572189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61286069 + 61286070.

It is an arithmetic number, because the mean of its divisors is an integer number (61286070).

Almost surely, 2^122572139 is an apocalyptic number.

122572139 is a deficient number, since it is larger than the sum of its proper divisors (1).

122572139 is an equidigital number, since it uses as much as digits as its factorization.

122572139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 32.

The square root of 122572139 is about 11071.2302387765. The cubic root of 122572139 is about 496.7416646251.

The spelling of 122572139 in words is "one hundred twenty-two million, five hundred seventy-two thousand, one hundred thirty-nine".