871912 has 16 divisors (see below), whose sum is σ = 1658340. Its totient is φ = 429696.

The previous prime is 871901. The next prime is 871919. The reversal of 871912 is 219178.

It can be written as a sum of positive squares in 2 ways, for example, as 820836 + 51076 = 906^2 + 226^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (871919) by changing a digit.

871912 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 3 ways as a sum of consecutive naturals, for example, 163 + ... + 1330.

2⁸⁷¹⁹¹² is an apocalyptic number.

It is an amenable number.

871912 is a deficient number, since it is larger than the sum of its proper divisors (786428).

871912 is a wasteful number, since it uses less digits than its factorization.

871912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572 (or 1568 counting only the distinct ones).

The product of its digits is 1008, while the sum is 28.

The square root of 871912 is about 933.7622823824. The cubic root of 871912 is about 95.5339097256.

The spelling of 871912 in words is "eight hundred seventy-one thousand, nine hundred twelve".