321385 has 16 divisors (see below), whose sum is σ = 432000. Its totient is φ = 228096.

The previous prime is 321383. The next prime is 321397. The reversal of 321385 is 583123.

It is a cyclic number.

It is not a de Polignac number, because 321385 - 2¹ = 321383 is a prime.

Its product of digits (720) is a multiple of the sum of its prime divisors (240).

It is not an unprimeable number, because it can be changed into a prime (321383) 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 15 ways as a sum of consecutive naturals, for example, 1516 + ... + 1714.

It is an arithmetic number, because the mean of its divisors is an integer number (27000).

2³²¹³⁸⁵ is an apocalyptic number.

It is an amenable number.

321385 is a deficient number, since it is larger than the sum of its proper divisors (110615).

321385 is a wasteful number, since it uses less digits than its factorization.

321385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240.

The product of its digits is 720, while the sum is 22.

The square root of 321385 is about 566.9082818234. The cubic root of 321385 is about 68.4975757041.

The spelling of 321385 in words is "three hundred twenty-one thousand, three hundred eighty-five".