8003321 has 4 divisors (see below), whose sum is σ = 8038500. Its totient is φ = 7968144.

The previous prime is 8003309. The next prime is 8003381. The reversal of 8003321 is 1233008.

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 3759721 + 4243600 = 1939^2 + 2060^2 .

It is a cyclic number.

It is not a de Polignac number, because 8003321 - 2⁶ = 8003257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8003321.

It is not an unprimeable number, because it can be changed into a prime (8003381) 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, 17246 + ... + 17703.

It is an arithmetic number, because the mean of its divisors is an integer number (2009625).

Almost surely, 2^8003321 is an apocalyptic number.

It is an amenable number.

8003321 is a deficient number, since it is larger than the sum of its proper divisors (35179).

8003321 is a wasteful number, since it uses less digits than its factorization.

8003321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35178.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 8003321 is about 2829.0141392365. The cubic root of 8003321 is about 200.0276711714.

Adding to 8003321 its reverse (1233008), we get a palindrome (9236329).

The spelling of 8003321 in words is "eight million, three thousand, three hundred twenty-one".