6855543 has 8 divisors (see below), whose sum is σ = 10156400. Its totient is φ = 4570344.

The previous prime is 6855529. The next prime is 6855593. The reversal of 6855543 is 3455586.

6855543 is a `hidden beast` number, since 68 + 55 + 543 = 666.

It is not a de Polignac number, because 6855543 - 2⁶ = 6855479 is a prime.

It is a Duffinian number.

6855543 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6855498 and 6855507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6855593) 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, 126928 + ... + 126981.

It is an arithmetic number, because the mean of its divisors is an integer number (1269550).

Almost surely, 2^6855543 is an apocalyptic number.

6855543 is a deficient number, since it is larger than the sum of its proper divisors (3300857).

6855543 is a wasteful number, since it uses less digits than its factorization.

6855543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253918 (or 253912 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 6855543 is about 2618.3091872428. The cubic root of 6855543 is about 189.9680740448.

It can be divided in two parts, 68 and 55543, that added together give a triangular number (55611 = T₃₃₃).

The spelling of 6855543 in words is "six million, eight hundred fifty-five thousand, five hundred forty-three".