8185321 has 3 divisors (see below), whose sum is σ = 8188183. Its totient is φ = 8182460.

The previous prime is 8185301. The next prime is 8185369. The reversal of 8185321 is 1235818.

The square root of 8185321 is 2861.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 4575321 + 3610000 = 2139^2 + 1900^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8185321 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 8185321.

It is not an unprimeable number, because it can be changed into a prime (8185301) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1431 + ... + 4291.

Almost surely, 2^8185321 is an apocalyptic number.

8185321 is the 2861-st square number.

8185321 is the 1431-st centered octagonal number.

It is an amenable number.

8185321 is a deficient number, since it is larger than the sum of its proper divisors (2862).

8185321 is an frugal number, since it uses more digits than its factorization.

8185321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5722 (or 2861 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The cubic root of 8185321 is about 201.5325678486.

The spelling of 8185321 in words is "eight million, one hundred eighty-five thousand, three hundred twenty-one".