124539 has 4 divisors (see below), whose sum is σ = 166056. Its totient is φ = 83024.

The previous prime is 124529. The next prime is 124541. The reversal of 124539 is 935421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935421 = 3 ⋅311807.

It is a cyclic number.

It is not a de Polignac number, because 124539 - 2¹⁵ = 91771 is a prime.

It is a D-number.

It is a plaindrome in base 13 and base 14.

It is not an unprimeable number, because it can be changed into a prime (124529) 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, 20754 + ... + 20759.

It is an arithmetic number, because the mean of its divisors is an integer number (41514).

2¹²⁴⁵³⁹ is an apocalyptic number.

124539 is a deficient number, since it is larger than the sum of its proper divisors (41517).

124539 is an equidigital number, since it uses as much as digits as its factorization.

124539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41516.

The product of its digits is 1080, while the sum is 24.

The square root of 124539 is about 352.9008359299. The cubic root of 124539 is about 49.9384576151.

The spelling of 124539 in words is "one hundred twenty-four thousand, five hundred thirty-nine".