Subtracting from 6455 its reverse (5546), we obtain a palindrome (909).
It is a semiprime because it is the product of two primes.
It is a Duffinian number.
It is a plaindrome in base 8 and base 12.
It is a nialpdrome in base 9.
It is a congruent number.
6455 is a Friedman number, since it can be written as 5*(6^4-5), using all its digits and the basic arithmetic operations.
26455 is an apocalyptic number.
6455 is a wasteful number, since it uses less digits than its factorization.
6455 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1296.
The square root of 6455 is about 80.3430146310. The cubic root of 6455 is about 18.6193885772.
The spelling of 6455 in words is "six thousand, four hundred fifty-five".