124798139 has 4 divisors (see below), whose sum is σ = 132139224. Its totient is φ = 117457056.

The previous prime is 124798127. The next prime is 124798171. The reversal of 124798139 is 931897421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 124798139 - 2⁴ = 124798123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 124798139.

It is not an unprimeable number, because it can be changed into a prime (124798439) 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, 3670517 + ... + 3670550.

It is an arithmetic number, because the mean of its divisors is an integer number (33034806).

Almost surely, 2^124798139 is an apocalyptic number.

124798139 is a deficient number, since it is larger than the sum of its proper divisors (7341085).

124798139 is an equidigital number, since it uses as much as digits as its factorization.

124798139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7341084.

The product of its digits is 108864, while the sum is 44.

The square root of 124798139 is about 11171.3087415934. The cubic root of 124798139 is about 499.7307069886.

The spelling of 124798139 in words is "one hundred twenty-four million, seven hundred ninety-eight thousand, one hundred thirty-nine".