320845 has 16 divisors (see below), whose sum is σ = 449280. Its totient is φ = 215424.

The previous prime is 320843. The next prime is 320851. The reversal of 320845 is 548023.

It is a cyclic number.

It is not a de Polignac number, because 320845 - 2¹ = 320843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320843) 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, 3064 + ... + 3166.

It is an arithmetic number, because the mean of its divisors is an integer number (28080).

2³²⁰⁸⁴⁵ is an apocalyptic number.

320845 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

320845 is a deficient number, since it is larger than the sum of its proper divisors (128435).

320845 is a wasteful number, since it uses less digits than its factorization.

320845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 320845 is about 566.4318140783. The cubic root of 320845 is about 68.4591903545.

Adding to 320845 its reverse (548023), we get a palindrome (868868).

It can be divided in two parts, 320 and 845, that multiplied together give a square (270400 = 520²).

The spelling of 320845 in words is "three hundred twenty thousand, eight hundred forty-five".