320755 has 4 divisors (see below), whose sum is σ = 384912. Its totient is φ = 256600.

The previous prime is 320741. The next prime is 320759. The reversal of 320755 is 557023.

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

It is not a de Polignac number, because 320755 - 2⁷ = 320627 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

320755 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (320759) 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 in 3 ways as a sum of consecutive naturals, for example, 32071 + ... + 32080.

It is an arithmetic number, because the mean of its divisors is an integer number (96228).

2³²⁰⁷⁵⁵ is an apocalyptic number.

320755 is a deficient number, since it is larger than the sum of its proper divisors (64157).

320755 is an equidigital number, since it uses as much as digits as its factorization.

320755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64156.

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 320755 is about 566.3523638160. The cubic root of 320755 is about 68.4527886098.

Adding to 320755 its reverse (557023), we get a palindrome (877778).

The spelling of 320755 in words is "three hundred twenty thousand, seven hundred fifty-five".