871580 has 12 divisors (see below), whose sum is σ = 1830360. Its totient is φ = 348624.

The previous prime is 871571. The next prime is 871589. The reversal of 871580 is 85178.

It is a happy number.

871580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (871571) and next prime (871589).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871589) by changing a digit.

871580 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21770 + ... + 21809.

It is an arithmetic number, because the mean of its divisors is an integer number (152530).

2⁸⁷¹⁵⁸⁰ is an apocalyptic number.

It is an amenable number.

871580 is an abundant number, since it is smaller than the sum of its proper divisors (958780).

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

871580 is a wasteful number, since it uses less digits than its factorization.

871580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43588 (or 43586 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 871580 is about 933.5844900168. The cubic root of 871580 is about 95.5217826284.

The spelling of 871580 in words is "eight hundred seventy-one thousand, five hundred eighty".