122425139 has 4 divisors (see below), whose sum is σ = 125411160. Its totient is φ = 119439120.

The previous prime is 122425129. The next prime is 122425141. The reversal of 122425139 is 931524221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931524221 = 4259 ⋅218719.

It is a cyclic number.

It is not a de Polignac number, because 122425139 - 2⁴ = 122425123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122425129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1492949 + ... + 1493030.

It is an arithmetic number, because the mean of its divisors is an integer number (31352790).

Almost surely, 2^122425139 is an apocalyptic number.

122425139 is a deficient number, since it is larger than the sum of its proper divisors (2986021).

122425139 is an equidigital number, since it uses as much as digits as its factorization.

122425139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2986020.

The product of its digits is 4320, while the sum is 29.

The square root of 122425139 is about 11064.5894185008. The cubic root of 122425139 is about 496.5430054627.

The spelling of 122425139 in words is "one hundred twenty-two million, four hundred twenty-five thousand, one hundred thirty-nine".