320961 has 8 divisors (see below), whose sum is σ = 433440. Its totient is φ = 211232.

The previous prime is 320953. The next prime is 321007. The reversal of 320961 is 169023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320961 - 2³ = 320953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (320911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396 + ... + 893.

It is an arithmetic number, because the mean of its divisors is an integer number (54180).

2³²⁰⁹⁶¹ is an apocalyptic number.

It is an amenable number.

320961 is a deficient number, since it is larger than the sum of its proper divisors (112479).

320961 is a wasteful number, since it uses less digits than its factorization.

320961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 320961 is about 566.5342002033. The cubic root of 320961 is about 68.4674397264.

Adding to 320961 its reverse (169023), we get a palindrome (489984).

The spelling of 320961 in words is "three hundred twenty thousand, nine hundred sixty-one".