871860 has 48 divisors (see below), whose sum is σ = 2665152. Its totient is φ = 211200.

The previous prime is 871837. The next prime is 871867. The reversal of 871860 is 68178.

871860 is a nontrivial binomial coefficient, being equal to C(1321, 2).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871867) by changing a digit.

871860 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1 + ... + 1320.

It is an arithmetic number, because the mean of its divisors is an integer number (55524).

2⁸⁷¹⁸⁶⁰ is an apocalyptic number.

871860 is the 1320-th triangular number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 871860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1332576).

871860 is an abundant number, since it is smaller than the sum of its proper divisors (1793292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

871860 is a wasteful number, since it uses less digits than its factorization.

871860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344 (or 1342 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 871860 is about 933.7344376213. The cubic root of 871860 is about 95.5320105040.

It can be divided in two parts, 8718 and 60, that added together give a palindrome (8778).

The spelling of 871860 in words is "eight hundred seventy-one thousand, eight hundred sixty".