320045 has 18 divisors (see below), whose sum is σ = 441294. Its totient is φ = 222640.

The previous prime is 320041. The next prime is 320053. The reversal of 320045 is 540023.

It can be written as a sum of positive squares in only one way, i.e., 256036 + 64009 = 506^2 + 253^2 .

It is not a de Polignac number, because 320045 - 2² = 320041 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320041) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13904 + ... + 13926.

2³²⁰⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

320045 is a deficient number, since it is larger than the sum of its proper divisors (121249).

320045 is a wasteful number, since it uses less digits than its factorization.

320045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 320045 is about 565.7251983074. The cubic root of 320045 is about 68.4022439217.

Adding to 320045 its reverse (540023), we get a palindrome (860068).

The spelling of 320045 in words is "three hundred twenty thousand, forty-five".