5681321 has 4 divisors (see below), whose sum is σ = 5688144. Its totient is φ = 5674500.

The previous prime is 5681317. The next prime is 5681327. The reversal of 5681321 is 1231865.

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 5681321 - 2² = 5681317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5681327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1955 + ... + 3896.

It is an arithmetic number, because the mean of its divisors is an integer number (1422036).

Almost surely, 2^5681321 is an apocalyptic number.

It is an amenable number.

5681321 is a deficient number, since it is larger than the sum of its proper divisors (6823).

5681321 is an equidigital number, since it uses as much as digits as its factorization.

5681321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6822.

The product of its digits is 1440, while the sum is 26.

The square root of 5681321 is about 2383.5521810944. The cubic root of 5681321 is about 178.4362589435.

The spelling of 5681321 in words is "five million, six hundred eighty-one thousand, three hundred twenty-one".