321285 has 8 divisors (see below), whose sum is σ = 514080. Its totient is φ = 171344.

The previous prime is 321247. The next prime is 321289. The reversal of 321285 is 582123.

321285 = 125² + 126² + ... + 142².

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 321285 - 2⁶ = 321221 is a prime.

It is a d-powerful number, because it can be written as 3¹⁰ + 2 + 2¹⁸ + 1 + 8² + 5² .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 321285.

It is not an unprimeable number, because it can be changed into a prime (321289) 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, 10695 + ... + 10724.

It is an arithmetic number, because the mean of its divisors is an integer number (64260).

2³²¹²⁸⁵ is an apocalyptic number.

It is an amenable number.

321285 is a deficient number, since it is larger than the sum of its proper divisors (192795).

321285 is a wasteful number, since it uses less digits than its factorization.

321285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21427.

The product of its digits is 480, while the sum is 21.

The square root of 321285 is about 566.8200772732. The cubic root of 321285 is about 68.4904705517.

It can be divided in two parts, 321 and 285, that added together give a palindrome (606).

The spelling of 321285 in words is "three hundred twenty-one thousand, two hundred eighty-five".