6456551 has 2 divisors, whose sum is σ = 6456552. Its totient is φ = 6456550.

The previous prime is 6456539. The next prime is 6456559. The reversal of 6456551 is 1556546.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6456551 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6456559) 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, 3228275 + 3228276.

It is an arithmetic number, because the mean of its divisors is an integer number (3228276).

Almost surely, 2^6456551 is an apocalyptic number.

6456551 is a deficient number, since it is larger than the sum of its proper divisors (1).

6456551 is an equidigital number, since it uses as much as digits as its factorization.

6456551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 32.

The square root of 6456551 is about 2540.9744193911. The cubic root of 6456551 is about 186.2087973960.

It can be divided in two parts, 6456 and 551, that added together give a palindrome (7007).

The spelling of 6456551 in words is "six million, four hundred fifty-six thousand, five hundred fifty-one".