8287321 has 6 divisors (see below), whose sum is σ = 9640410. Its totient is φ = 7103376.

The previous prime is 8287309. The next prime is 8287327. The reversal of 8287321 is 1237828.

It can be written as a sum of positive squares in only one way, i.e., 5175625 + 3111696 = 2275^2 + 1764^2 .

It is not a de Polignac number, because 8287321 - 2⁹ = 8286809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8287327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84516 + ... + 84613.

It is an arithmetic number, because the mean of its divisors is an integer number (1606735).

Almost surely, 2^8287321 is an apocalyptic number.

It is an amenable number.

8287321 is a deficient number, since it is larger than the sum of its proper divisors (1353089).

8287321 is a wasteful number, since it uses less digits than its factorization.

8287321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169143 (or 169136 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 8287321 is about 2878.7707446061. The cubic root of 8287321 is about 202.3662358990.

The spelling of 8287321 in words is "eight million, two hundred eighty-seven thousand, three hundred twenty-one".