800321 has 4 divisors (see below), whose sum is σ = 802644. Its totient is φ = 798000.

The previous prime is 800311. The next prime is 800329. The reversal of 800321 is 123008.

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 25921 + 774400 = 161^2 + 880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 800296 and 800305.

It is not an unprimeable number, because it can be changed into a prime (800329) 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, 530 + ... + 1371.

It is an arithmetic number, because the mean of its divisors is an integer number (200661).

2⁸⁰⁰³²¹ is an apocalyptic number.

It is an amenable number.

800321 is a deficient number, since it is larger than the sum of its proper divisors (2323).

800321 is a wasteful number, since it uses less digits than its factorization.

800321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2322.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 800321 is about 894.6066174582. The cubic root of 800321 is about 92.8441912621.

Adding to 800321 its reverse (123008), we get a palindrome (923329).

The spelling of 800321 in words is "eight hundred thousand, three hundred twenty-one".