122312139 has 8 divisors (see below), whose sum is σ = 171666240. Its totient is φ = 77249736.

The previous prime is 122312131. The next prime is 122312147. The reversal of 122312139 is 931213221.

It is an interprime number because it is at equal distance from previous prime (122312131) and next prime (122312147).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 122312139 - 2³ = 122312131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122312131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1072857 + ... + 1072970.

It is an arithmetic number, because the mean of its divisors is an integer number (21458280).

Almost surely, 2^122312139 is an apocalyptic number.

122312139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

122312139 is a deficient number, since it is larger than the sum of its proper divisors (49354101).

122312139 is a wasteful number, since it uses less digits than its factorization.

122312139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145849.

The product of its digits is 648, while the sum is 24.

The square root of 122312139 is about 11059.4818594724. The cubic root of 122312139 is about 496.3901865451.

The spelling of 122312139 in words is "one hundred twenty-two million, three hundred twelve thousand, one hundred thirty-nine".