320139 has 16 divisors (see below), whose sum is σ = 483840. Its totient is φ = 209160.

The previous prime is 320119. The next prime is 320141. The reversal of 320139 is 931023.

It is not a de Polignac number, because 320139 - 2⁵ = 320107 is a prime.

320139 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320139.

It is not an unprimeable number, because it can be changed into a prime (320119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1834 + ... + 2000.

It is an arithmetic number, because the mean of its divisors is an integer number (30240).

2³²⁰¹³⁹ is an apocalyptic number.

320139 is a deficient number, since it is larger than the sum of its proper divisors (163701).

320139 is a wasteful number, since it uses less digits than its factorization.

320139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 320139 is about 565.8082714136. The cubic root of 320139 is about 68.4089400441.

It can be divided in two parts, 3201 and 39, that added together give a triangular number (3240 = T₈₀).

The spelling of 320139 in words is "three hundred twenty thousand, one hundred thirty-nine".