120839 has 4 divisors (see below), whose sum is σ = 121800. Its totient is φ = 119880.

The previous prime is 120833. The next prime is 120847. The reversal of 120839 is 938021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 120839 - 2⁴ = 120823 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120833) 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, 257 + ... + 554.

It is an arithmetic number, because the mean of its divisors is an integer number (30450).

2¹²⁰⁸³⁹ is an apocalyptic number.

120839 is a deficient number, since it is larger than the sum of its proper divisors (961).

120839 is an equidigital number, since it uses as much as digits as its factorization.

120839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 120839 is about 347.6190443575. The cubic root of 120839 is about 49.4389275033.

It can be divided in two parts, 120 and 839, that added together give a palindrome (959).

The spelling of 120839 in words is "one hundred twenty thousand, eight hundred thirty-nine".