6451321 has 2 divisors, whose sum is σ = 6451322. Its totient is φ = 6451320.

The previous prime is 6451307. The next prime is 6451331. The reversal of 6451321 is 1231546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5569600 + 881721 = 2360^2 + 939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6451321 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6451292 and 6451301.

It is not a weakly prime, because it can be changed into another prime (6451301) 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 as a sum of consecutive naturals, namely, 3225660 + 3225661.

It is an arithmetic number, because the mean of its divisors is an integer number (3225661).

Almost surely, 2^6451321 is an apocalyptic number.

It is an amenable number.

6451321 is a deficient number, since it is larger than the sum of its proper divisors (1).

6451321 is an equidigital number, since it uses as much as digits as its factorization.

6451321 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 6451321 is about 2539.9450781464. The cubic root of 6451321 is about 186.1585055769.

Adding to 6451321 its reverse (1231546), we get a palindrome (7682867).

The spelling of 6451321 in words is "six million, four hundred fifty-one thousand, three hundred twenty-one".