320559 has 4 divisors (see below), whose sum is σ = 427416. Its totient is φ = 213704.

The previous prime is 320539. The next prime is 320561. The reversal of 320559 is 955023.

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

It is a cyclic number.

It is not a de Polignac number, because 320559 - 2⁷ = 320431 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320559.

It is not an unprimeable number, because it can be changed into a prime (320539) 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, 53424 + ... + 53429.

It is an arithmetic number, because the mean of its divisors is an integer number (106854).

2³²⁰⁵⁵⁹ is an apocalyptic number.

320559 is a deficient number, since it is larger than the sum of its proper divisors (106857).

320559 is a wasteful number, since it uses less digits than its factorization.

320559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106856.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 320559 is about 566.1793002221. The cubic root of 320559 is about 68.4388428877.

The spelling of 320559 in words is "three hundred twenty thousand, five hundred fifty-nine".