856005271 has 8 divisors (see below), whose sum is σ = 982972800. Its totient is φ = 737229240.

The previous prime is 856005203. The next prime is 856005281. The reversal of 856005271 is 172500658.

856005271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 856005271 - 2¹¹ = 856003223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856005281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2047651 + ... + 2048068.

It is an arithmetic number, because the mean of its divisors is an integer number (122871600).

Almost surely, 2^856005271 is an apocalyptic number.

856005271 is a deficient number, since it is larger than the sum of its proper divisors (126967529).

856005271 is a wasteful number, since it uses less digits than its factorization.

856005271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4095749.

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

The square root of 856005271 is about 29257.5677560525. The cubic root of 856005271 is about 949.4938285993.

The spelling of 856005271 in words is "eight hundred fifty-six million, five thousand, two hundred seventy-one".