321985 has 8 divisors (see below), whose sum is σ = 392256. Its totient is φ = 253680.

The previous prime is 321983. The next prime is 321991. The reversal of 321985 is 589123.

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

It is not a de Polignac number, because 321985 - 2¹ = 321983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321983) 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, 99 + ... + 808.

It is an arithmetic number, because the mean of its divisors is an integer number (49032).

2³²¹⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

321985 is a deficient number, since it is larger than the sum of its proper divisors (70271).

321985 is an equidigital number, since it uses as much as digits as its factorization.

321985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983.

The product of its digits is 2160, while the sum is 28.

The square root of 321985 is about 567.4372211972. The cubic root of 321985 is about 68.5401756968.

The spelling of 321985 in words is "three hundred twenty-one thousand, nine hundred eighty-five".