851371 has 4 divisors (see below), whose sum is σ = 896200. Its totient is φ = 806544.

The previous prime is 851363. The next prime is 851381. The reversal of 851371 is 173158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 173158 = 2 ⋅86579.

It is a cyclic number.

It is not a de Polignac number, because 851371 - 2³ = 851363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (851321) 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, 22386 + ... + 22423.

It is an arithmetic number, because the mean of its divisors is an integer number (224050).

2⁸⁵¹³⁷¹ is an apocalyptic number.

851371 is a deficient number, since it is larger than the sum of its proper divisors (44829).

851371 is a wasteful number, since it uses less digits than its factorization.

851371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44828.

The product of its digits is 840, while the sum is 25.

The square root of 851371 is about 922.6976752978. The cubic root of 851371 is about 94.7777259591. Note that the first 4 decimals are identical.

The spelling of 851371 in words is "eight hundred fifty-one thousand, three hundred seventy-one".