856471 has 16 divisors (see below), whose sum is σ = 1094400. Its totient is φ = 664440.

The previous prime is 856469. The next prime is 856483. The reversal of 856471 is 174658.

856471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 856471 - 2¹ = 856469 is a prime.

It is a super-3 number, since 3×856471³ = 1884773825280525333, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856411) 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, 3660 + ... + 3886.

It is an arithmetic number, because the mean of its divisors is an integer number (68400).

2⁸⁵⁶⁴⁷¹ is an apocalyptic number.

856471 is a deficient number, since it is larger than the sum of its proper divisors (237929).

856471 is a wasteful number, since it uses less digits than its factorization.

856471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 245 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 856471 is about 925.4571843149. The cubic root of 856471 is about 94.9665995233.

It can be divided in two parts, 85 and 6471, that added together give a palindrome (6556).

The spelling of 856471 in words is "eight hundred fifty-six thousand, four hundred seventy-one".