6855565 has 4 divisors (see below), whose sum is σ = 8226684. Its totient is φ = 5484448.

The previous prime is 6855529. The next prime is 6855593. The reversal of 6855565 is 5655586.

It is a happy number.

6855565 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5655586 = 2 ⋅2827793.

It can be written as a sum of positive squares in 2 ways, for example, as 5076009 + 1779556 = 2253^2 + 1334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6855565 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685552 + ... + 685561.

It is an arithmetic number, because the mean of its divisors is an integer number (2056671).

Almost surely, 2^6855565 is an apocalyptic number.

It is an amenable number.

6855565 is a deficient number, since it is larger than the sum of its proper divisors (1371119).

6855565 is a wasteful number, since it uses less digits than its factorization.

6855565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371118.

The product of its digits is 180000, while the sum is 40.

The square root of 6855565 is about 2618.3133884239. The cubic root of 6855565 is about 189.9682772523.

The spelling of 6855565 in words is "six million, eight hundred fifty-five thousand, five hundred sixty-five".