320065 has 4 divisors (see below), whose sum is σ = 384084. Its totient is φ = 256048.

The previous prime is 320063. The next prime is 320081. The reversal of 320065 is 560023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 254016 + 66049 = 504^2 + 257^2 .

It is a cyclic number.

It is not a de Polignac number, because 320065 - 2¹ = 320063 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32002 + ... + 32011.

It is an arithmetic number, because the mean of its divisors is an integer number (96021).

2³²⁰⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

320065 is a deficient number, since it is larger than the sum of its proper divisors (64019).

320065 is an equidigital number, since it uses as much as digits as its factorization.

320065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64018.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 320065 is about 565.7428744580. The cubic root of 320065 is about 68.4036687384.

Adding to 320065 its reverse (560023), we get a palindrome (880088).

The spelling of 320065 in words is "three hundred twenty thousand, sixty-five".