6856571 has 4 divisors (see below), whose sum is σ = 6882144. Its totient is φ = 6831000.

The previous prime is 6856561. The next prime is 6856573. The reversal of 6856571 is 1756586.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6856571 - 2¹⁴ = 6840187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6856573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12380 + ... + 12921.

It is an arithmetic number, because the mean of its divisors is an integer number (1720536).

Almost surely, 2^6856571 is an apocalyptic number.

6856571 is a deficient number, since it is larger than the sum of its proper divisors (25573).

6856571 is a wasteful number, since it uses less digits than its factorization.

6856571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25572.

The product of its digits is 50400, while the sum is 38.

The square root of 6856571 is about 2618.5054897785. The cubic root of 6856571 is about 189.9775689124.

The spelling of 6856571 in words is "six million, eight hundred fifty-six thousand, five hundred seventy-one".