850851 has 8 divisors (see below), whose sum is σ = 1260560. Its totient is φ = 567216.

The previous prime is 850849. The next prime is 850853. The reversal of 850851 is 158058.

It is an interprime number because it is at equal distance from previous prime (850849) and next prime (850853).

It is not a de Polignac number, because 850851 - 2¹ = 850849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 31513 = 850851 / (8 + 5 + 0 + 8 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850853) 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, 15730 + ... + 15783.

It is an arithmetic number, because the mean of its divisors is an integer number (157570).

2⁸⁵⁰⁸⁵¹ is an apocalyptic number.

850851 is a deficient number, since it is larger than the sum of its proper divisors (409709).

850851 is a wasteful number, since it uses less digits than its factorization.

850851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31522 (or 31516 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 850851 is about 922.4158498205. The cubic root of 850851 is about 94.7584259302.

850851 divided by its sum of digits (27) gives a palindrome (31513).

The spelling of 850851 in words is "eight hundred fifty thousand, eight hundred fifty-one".