86321 has 4 divisors (see below), whose sum is σ = 88692.
Its totient is φ = 83952.
The previous prime is 86311. The next prime is 86323. The reversal of 86321 is 12368.
Adding to 86321 its reverse (12368), we get a palindrome (98689).
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 55696 + 30625 = 236^2 + 175^2
It is a cyclic number.
It is not a de Polignac number, because 86321 - 26 = 86257 is a prime.
It is an Ulam number.
It is a pancake number, because a pancake can be divided into 86321 parts by 415 straight cuts.
It is a Duffinian number.
It is a Curzon number.
It is a nialpdrome in base 10.
It is a junction number, because it is equal to n+sod(n) for n = 86293 and 86302.
It is not an unprimeable number, because it can be changed into a prime (86323) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1130 + ... + 1203.
It is an arithmetic number, because the mean of its divisors is an integer number (22173).
286321 is an apocalyptic number.
It is an amenable number.
86321 is a deficient number, since it is larger than the sum of its proper divisors (2371).
86321 is a wasteful number, since it uses less digits than its factorization.
86321 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2370.
The product of its digits is 288, while the sum is 20.
The square root of 86321 is about 293.8043566729.
The cubic root of 86321 is about 44.1948998708.
The spelling of 86321 in words is "eighty-six thousand, three hundred twenty-one".