6855 has 8 divisors (see below), whose sum is σ = 10992. Its totient is φ = 3648.

The previous prime is 6841. The next prime is 6857. The reversal of 6855 is 5586.

6855 = 35² + 36² + ... + 39².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6855 - 2⁵ = 6823 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214 + ... + 243.

It is an arithmetic number, because the mean of its divisors is an integer number (1374).

2⁶⁸⁵⁵ is an apocalyptic number.

6855 is a deficient number, since it is larger than the sum of its proper divisors (4137).

6855 is a wasteful number, since it uses less digits than its factorization.

6855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465.

The product of its digits is 1200, while the sum is 24.

The square root of 6855 is about 82.7949273808. The cubic root of 6855 is about 18.9963058377.

It can be divided in two parts, 6 and 855, that added together give a triangular number (861 = T₄₁).

The spelling of 6855 in words is "six thousand, eight hundred fifty-five".