124139 has 2 divisors, whose sum is σ = 124140. Its totient is φ = 124138.

The previous prime is 124133. The next prime is 124147. The reversal of 124139 is 931421.

It is a weak prime.

It is an emirp because it is prime and its reverse (931421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124139 - 2⁴ = 124123 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 124139.

It is not a weakly prime, because it can be changed into another prime (124133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62069 + 62070.

It is an arithmetic number, because the mean of its divisors is an integer number (62070).

2¹²⁴¹³⁹ is an apocalyptic number.

124139 is a deficient number, since it is larger than the sum of its proper divisors (1).

124139 is an equidigital number, since it uses as much as digits as its factorization.

124139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 124139 is about 352.3336486911. Note that the first 3 decimals coincide. The cubic root of 124139 is about 49.8849354059.

The spelling of 124139 in words is "one hundred twenty-four thousand, one hundred thirty-nine".