320506 has 4 divisors (see below), whose sum is σ = 480762. Its totient is φ = 160252.

The previous prime is 320483. The next prime is 320513. The reversal of 320506 is 605023.

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

It can be written as a sum of positive squares in only one way, i.e., 194481 + 126025 = 441^2 + 355^2 .

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 320506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80125 + ... + 80128.

2³²⁰⁵⁰⁶ is an apocalyptic number.

320506 is a deficient number, since it is larger than the sum of its proper divisors (160256).

320506 is a wasteful number, since it uses less digits than its factorization.

320506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160255.

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

The square root of 320506 is about 566.1324933264. The cubic root of 320506 is about 68.4350708742.

Adding to 320506 its reverse (605023), we get a palindrome (925529).

The spelling of 320506 in words is "three hundred twenty thousand, five hundred six".