8291321 has 4 divisors (see below), whose sum is σ = 8342352. Its totient is φ = 8240292.

The previous prime is 8291299. The next prime is 8291333. The reversal of 8291321 is 1231928.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8291321 - 2¹⁰ = 8290297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8291341) 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, 25271 + ... + 25596.

It is an arithmetic number, because the mean of its divisors is an integer number (2085588).

Almost surely, 2^8291321 is an apocalyptic number.

It is an amenable number.

8291321 is a deficient number, since it is larger than the sum of its proper divisors (51031).

8291321 is a wasteful number, since it uses less digits than its factorization.

8291321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51030.

The product of its digits is 864, while the sum is 26.

The square root of 8291321 is about 2879.4654017717. The cubic root of 8291321 is about 202.3987890302.

The spelling of 8291321 in words is "eight million, two hundred ninety-one thousand, three hundred twenty-one".