6541321 has 2 divisors, whose sum is σ = 6541322. Its totient is φ = 6541320.

The previous prime is 6541309. The next prime is 6541333. The reversal of 6541321 is 1231456.

It is a balanced prime because it is at equal distance from previous prime (6541309) and next prime (6541333).

It can be written as a sum of positive squares in only one way, i.e., 4182025 + 2359296 = 2045^2 + 1536^2 .

It is a cyclic number.

It is not a de Polignac number, because 6541321 - 2¹⁷ = 6410249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6541292 and 6541301.

It is not a weakly prime, because it can be changed into another prime (6541351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270660 + 3270661.

It is an arithmetic number, because the mean of its divisors is an integer number (3270661).

Almost surely, 2^6541321 is an apocalyptic number.

It is an amenable number.

6541321 is a deficient number, since it is larger than the sum of its proper divisors (1).

6541321 is an equidigital number, since it uses as much as digits as its factorization.

6541321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 6541321 is about 2557.6006334062. The cubic root of 6541321 is about 187.0201871312.

Adding to 6541321 its reverse (1231456), we get a palindrome (7772777).

The spelling of 6541321 in words is "six million, five hundred forty-one thousand, three hundred twenty-one".