6855217 has 2 divisors, whose sum is σ = 6855218. Its totient is φ = 6855216.

The previous prime is 6855203. The next prime is 6855221. The reversal of 6855217 is 7125586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4532641 + 2322576 = 2129^2 + 1524^2 .

It is a cyclic number.

It is not a de Polignac number, because 6855217 - 2⁷ = 6855089 is a prime.

It is not a weakly prime, because it can be changed into another prime (6855227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3427608 + 3427609.

It is an arithmetic number, because the mean of its divisors is an integer number (3427609).

Almost surely, 2^6855217 is an apocalyptic number.

It is an amenable number.

6855217 is a deficient number, since it is larger than the sum of its proper divisors (1).

6855217 is an equidigital number, since it uses as much as digits as its factorization.

6855217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 34.

The square root of 6855217 is about 2618.2469325868. The cubic root of 6855217 is about 189.9650628282.

The spelling of 6855217 in words is "six million, eight hundred fifty-five thousand, two hundred seventeen".