124356139 has 4 divisors (see below), whose sum is σ = 131671224. Its totient is φ = 117041056.

The previous prime is 124356107. The next prime is 124356151. The reversal of 124356139 is 931653421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931653421 = 167 ⋅5578763.

It is not a de Polignac number, because 124356139 - 2⁵ = 124356107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124356439) 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, 3657517 + ... + 3657550.

It is an arithmetic number, because the mean of its divisors is an integer number (32917806).

Almost surely, 2^124356139 is an apocalyptic number.

124356139 is a deficient number, since it is larger than the sum of its proper divisors (7315085).

124356139 is an equidigital number, since it uses as much as digits as its factorization.

124356139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7315084.

The product of its digits is 19440, while the sum is 34.

The square root of 124356139 is about 11151.5083733099. The cubic root of 124356139 is about 499.1400404538.

The spelling of 124356139 in words is "one hundred twenty-four million, three hundred fifty-six thousand, one hundred thirty-nine".