85321 has 4 divisors (see below), whose sum is σ = 87444. Its totient is φ = 83200.

The previous prime is 85313. The next prime is 85331. The reversal of 85321 is 12358.

It is a happy number.

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 15625 + 69696 = 125^2 + 264^2 .

It is a cyclic number.

It is not a de Polignac number, because 85321 - 2³ = 85313 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000 + ... + 1081.

It is an arithmetic number, because the mean of its divisors is an integer number (21861).

2⁸⁵³²¹ is an apocalyptic number.

It is an amenable number.

85321 is a deficient number, since it is larger than the sum of its proper divisors (2123).

85321 is a wasteful number, since it uses less digits than its factorization.

85321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122.

The product of its digits is 240, while the sum is 19.

The square root of 85321 is about 292.0975864330. The cubic root of 85321 is about 44.0235755201.

Adding to 85321 its reverse (12358), we get a palindrome (97679).

It can be divided in two parts, 85 and 321, that added together give a triangular number (406 = T₂₈).

The spelling of 85321 in words is "eighty-five thousand, three hundred twenty-one".