872851 has 4 divisors (see below), whose sum is σ = 997552. Its totient is φ = 748152.

The previous prime is 872843. The next prime is 872863. The reversal of 872851 is 158278.

872851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158278 = 2 ⋅79139.

It is a cyclic number.

It is not a de Polignac number, because 872851 - 2³ = 872843 is a prime.

It is a super-3 number, since 3×872851³ = 1994994010434333153, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (872251) 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, 62340 + ... + 62353.

It is an arithmetic number, because the mean of its divisors is an integer number (249388).

2⁸⁷²⁸⁵¹ is an apocalyptic number.

872851 is a deficient number, since it is larger than the sum of its proper divisors (124701).

872851 is a wasteful number, since it uses less digits than its factorization.

872851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124700.

The product of its digits is 4480, while the sum is 31.

The square root of 872851 is about 934.2649517134. The cubic root of 872851 is about 95.5681922975.

The spelling of 872851 in words is "eight hundred seventy-two thousand, eight hundred fifty-one".