320995 has 8 divisors (see below), whose sum is σ = 394416. Its totient is φ = 250656.

The previous prime is 320953. The next prime is 321007. The reversal of 320995 is 599023.

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 320995 - 2⁷ = 320867 is a prime.

It is a Duffinian number.

320995 is a lucky number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 532 + ... + 961.

It is an arithmetic number, because the mean of its divisors is an integer number (49302).

2³²⁰⁹⁹⁵ is an apocalyptic number.

320995 is a deficient number, since it is larger than the sum of its proper divisors (73421).

320995 is a wasteful number, since it uses less digits than its factorization.

320995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 320995 is about 566.5642064232. The cubic root of 320995 is about 68.4698572691.

The spelling of 320995 in words is "three hundred twenty thousand, nine hundred ninety-five".