321365 has 8 divisors (see below), whose sum is σ = 420768. Its totient is φ = 233680.

The previous prime is 321359. The next prime is 321367. The reversal of 321365 is 563123.

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

It is not a de Polignac number, because 321365 - 2⁶ = 321301 is a prime.

It is a Duffinian number.

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 321365.

It is not an unprimeable number, because it can be changed into a prime (321367) 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 7 ways as a sum of consecutive naturals, for example, 2867 + ... + 2976.

It is an arithmetic number, because the mean of its divisors is an integer number (52596).

2³²¹³⁶⁵ is an apocalyptic number.

It is an amenable number.

321365 is a deficient number, since it is larger than the sum of its proper divisors (99403).

321365 is a wasteful number, since it uses less digits than its factorization.

321365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5859.

The product of its digits is 540, while the sum is 20.

The square root of 321365 is about 566.8906420113. The cubic root of 321365 is about 68.4961547915.

Adding to 321365 its reverse (563123), we get a palindrome (884488).

It can be divided in two parts, 321 and 365, that added together give a palindrome (686).

The spelling of 321365 in words is "three hundred twenty-one thousand, three hundred sixty-five".