871139 has 4 divisors (see below), whose sum is σ = 873240. Its totient is φ = 869040.

The previous prime is 871103. The next prime is 871147. The reversal of 871139 is 931178.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871139 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (871159) by changing a digit.

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, 197 + ... + 1334.

It is an arithmetic number, because the mean of its divisors is an integer number (218310).

2⁸⁷¹¹³⁹ is an apocalyptic number.

871139 is a deficient number, since it is larger than the sum of its proper divisors (2101).

871139 is a wasteful number, since it uses less digits than its factorization.

871139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100.

The product of its digits is 1512, while the sum is 29.

The square root of 871139 is about 933.3482736899. The cubic root of 871139 is about 95.5056692814.

The spelling of 871139 in words is "eight hundred seventy-one thousand, one hundred thirty-nine".