124839 has 24 divisors (see below), whose sum is σ = 214032. Its totient is φ = 69120.

The previous prime is 124823. The next prime is 124847. The reversal of 124839 is 938421.

It is not a de Polignac number, because 124839 - 2⁴ = 124823 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 1 + 2 + 8 + 4⁸ + 3⁵ + 9⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1239 + ... + 1335.

It is an arithmetic number, because the mean of its divisors is an integer number (8918).

2¹²⁴⁸³⁹ is an apocalyptic number.

124839 is a deficient number, since it is larger than the sum of its proper divisors (89193).

124839 is a wasteful number, since it uses less digits than its factorization.

124839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 124 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 124839 is about 353.3256288468. The cubic root of 124839 is about 49.9785241104.

It can be divided in two parts, 12 and 4839, that added together give a triangular number (4851 = T₉₈).

The spelling of 124839 in words is "one hundred twenty-four thousand, eight hundred thirty-nine".