6451 has 2 divisors, whose sum is σ = 6452.
Its totient is φ = 6450.
The previous prime is 6449. The next prime is 6469. The reversal of 6451 is 1546.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 6451 - 21 = 6449 is a prime.
Together with 6449, it forms a pair of twin primes.
It is not a weakly prime, because it can be changed into another prime (6421) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3225 + 3226.
It is an arithmetic number, because the mean of its divisors is an integer number (3226).
26451 is an apocalyptic number.
6451 is a deficient number, since it is larger than the sum of its proper divisors (1).
6451 is an equidigital number, since it uses as much as digits as its factorization.
6451 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 120, while the sum is 16.
The square root of 6451 is about 80.3181175078.
The cubic root of 6451 is about 18.6155417947.
Adding to 6451 its reverse (1546), we get a palindrome (7997).
It can be divided in two parts, 645 and 1, that added together give a palindrome (646).
The spelling of 6451 in words is "six thousand, four hundred fifty-one".