8261321 has 4 divisors (see below), whose sum is σ = 8341632. Its totient is φ = 8181012.

The previous prime is 8261293. The next prime is 8261327. The reversal of 8261321 is 1231628.

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 8261321 - 2¹⁴ = 8244937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8261327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40001 + ... + 40206.

It is an arithmetic number, because the mean of its divisors is an integer number (2085408).

Almost surely, 2^8261321 is an apocalyptic number.

It is an amenable number.

8261321 is a deficient number, since it is larger than the sum of its proper divisors (80311).

8261321 is a wasteful number, since it uses less digits than its factorization.

8261321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80310.

The product of its digits is 576, while the sum is 23.

The square root of 8261321 is about 2874.2513807947. The cubic root of 8261321 is about 202.1543848031.

Adding to 8261321 its reverse (1231628), we get a palindrome (9492949).

The spelling of 8261321 in words is "eight million, two hundred sixty-one thousand, three hundred twenty-one".