6856641 has 12 divisors (see below), whose sum is σ = 10804560. Its totient is φ = 4155480.

The previous prime is 6856631. The next prime is 6856643. The reversal of 6856641 is 1466586.

6856641 is a `hidden beast` number, since 6 + 8 + 5 + 6 + 641 = 666.

6856641 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6856641 - 2¹³ = 6848449 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6856596 and 6856605.

It is not an unprimeable number, because it can be changed into a prime (6856643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34531 + ... + 34728.

It is an arithmetic number, because the mean of its divisors is an integer number (900380).

Almost surely, 2^6856641 is an apocalyptic number.

It is an amenable number.

6856641 is a deficient number, since it is larger than the sum of its proper divisors (3947919).

6856641 is a wasteful number, since it uses less digits than its factorization.

6856641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69276 (or 69273 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 6856641 is about 2618.5188561475. The cubic root of 6856641 is about 189.9782154156.

The spelling of 6856641 in words is "six million, eight hundred fifty-six thousand, six hundred forty-one".