851271 has 8 divisors (see below), whose sum is σ = 1161600. Its totient is φ = 554232.

The previous prime is 851267. The next prime is 851273. The reversal of 851271 is 172158.

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

It is not a de Polignac number, because 851271 - 2² = 851267 is a prime.

851271 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3171 + ... + 3428.

It is an arithmetic number, because the mean of its divisors is an integer number (145200).

2⁸⁵¹²⁷¹ is an apocalyptic number.

851271 is a deficient number, since it is larger than the sum of its proper divisors (310329).

851271 is a wasteful number, since it uses less digits than its factorization.

851271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6645.

The product of its digits is 560, while the sum is 24.

The square root of 851271 is about 922.6434847762. The cubic root of 851271 is about 94.7740150255.

The spelling of 851271 in words is "eight hundred fifty-one thousand, two hundred seventy-one".