806321 has 4 divisors (see below), whose sum is σ = 810612. Its totient is φ = 802032.

The previous prime is 806317. The next prime is 806329. The reversal of 806321 is 123608.

806321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 616225 + 190096 = 785^2 + 436^2 .

It is a cyclic number.

It is not a de Polignac number, because 806321 - 2² = 806317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 806293 and 806302.

It is not an unprimeable number, because it can be changed into a prime (806329) 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, 1850 + ... + 2243.

It is an arithmetic number, because the mean of its divisors is an integer number (202653).

2⁸⁰⁶³²¹ is an apocalyptic number.

It is an amenable number.

806321 is a deficient number, since it is larger than the sum of its proper divisors (4291).

806321 is a wasteful number, since it uses less digits than its factorization.

806321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4290.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 806321 is about 897.9537850023. The cubic root of 806321 is about 93.0756312354.

Adding to 806321 its reverse (123608), we get a palindrome (929929).

The spelling of 806321 in words is "eight hundred six thousand, three hundred twenty-one".