6455 has 4 divisors (see below), whose sum is σ = 7752. Its totient is φ = 5160.

The previous prime is 6451. The next prime is 6469. The reversal of 6455 is 5546.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6455 - 2² = 6451 is a prime.

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.

It is not an unprimeable number, because it can be changed into a prime (6451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641 + ... + 650.

It is an arithmetic number, because the mean of its divisors is an integer number (1938).

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 deficient number, since it is larger than the sum of its proper divisors (1297).

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 product of its digits is 600, while the sum is 20.

The square root of 6455 is about 80.3430146310. The cubic root of 6455 is about 18.6193885772.

Subtracting from 6455 its reverse (5546), we obtain a palindrome (909).

The spelling of 6455 in words is "six thousand, four hundred fifty-five".