320956 has 6 divisors (see below), whose sum is σ = 561680. Its totient is φ = 160476.

The previous prime is 320953. The next prime is 321007. The reversal of 320956 is 659023.

It is a self number, because there is not a number n which added to its sum of digits gives 320956.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40116 + ... + 40123.

2³²⁰⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

320956 is a deficient number, since it is larger than the sum of its proper divisors (240724).

320956 is a wasteful number, since it uses less digits than its factorization.

320956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80243 (or 80241 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 320956 is about 566.5297873899. The cubic root of 320956 is about 68.4670841911.

Adding to 320956 its reverse (659023), we get a palindrome (979979).

The spelling of 320956 in words is "three hundred twenty thousand, nine hundred fifty-six".