6856881 has 16 divisors (see below), whose sum is σ = 9471168. Its totient is φ = 4409600.

The previous prime is 6856873. The next prime is 6856897. The reversal of 6856881 is 1886586.

6856881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 6856881 - 2³ = 6856873 is a prime.

It is a super-2 number, since 2×6856881² = 94033634096322, which contains 22 as substring.

It is an Ulam number.

6856881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6856841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12901 + ... + 13421.

It is an arithmetic number, because the mean of its divisors is an integer number (591948).

Almost surely, 2^6856881 is an apocalyptic number.

It is an amenable number.

6856881 is a deficient number, since it is larger than the sum of its proper divisors (2614287).

6856881 is a wasteful number, since it uses less digits than its factorization.

6856881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672.

The product of its digits is 92160, while the sum is 42.

The square root of 6856881 is about 2618.5646831805. The cubic root of 6856881 is about 189.9804319644.

The spelling of 6856881 in words is "six million, eight hundred fifty-six thousand, eight hundred eighty-one".