321085 has 4 divisors (see below), whose sum is σ = 385308. Its totient is φ = 256864.

The previous prime is 321077. The next prime is 321091. The reversal of 321085 is 580123.

It is a happy number.

321085 is nontrivially palindromic in base 7.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 580123 = 37 ⋅15679.

It can be written as a sum of positive squares in 2 ways, for example, as 101124 + 219961 = 318^2 + 469^2 .

It is a cyclic number.

It is not a de Polignac number, because 321085 - 2³ = 321077 is a prime.

It is a Duffinian number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 32104 + ... + 32113.

It is an arithmetic number, because the mean of its divisors is an integer number (96327).

2³²¹⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

321085 is a deficient number, since it is larger than the sum of its proper divisors (64223).

321085 is an equidigital number, since it uses as much as digits as its factorization.

321085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64222.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 321085 is about 566.6436269826. The cubic root of 321085 is about 68.4762558229.

The spelling of 321085 in words is "three hundred twenty-one thousand, eighty-five".