124198139 has 4 divisors (see below), whose sum is σ = 133751856. Its totient is φ = 114644424.

The previous prime is 124198093. The next prime is 124198153. The reversal of 124198139 is 931891421.

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 124198139 - 2⁸ = 124197883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124198199) 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, 4776839 + ... + 4776864.

It is an arithmetic number, because the mean of its divisors is an integer number (33437964).

Almost surely, 2^124198139 is an apocalyptic number.

124198139 is a deficient number, since it is larger than the sum of its proper divisors (9553717).

124198139 is an equidigital number, since it uses as much as digits as its factorization.

124198139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9553716.

The product of its digits is 15552, while the sum is 38.

The square root of 124198139 is about 11144.4218782313. The cubic root of 124198139 is about 498.9285576626.

The spelling of 124198139 in words is "one hundred twenty-four million, one hundred ninety-eight thousand, one hundred thirty-nine".