871995 has 16 divisors (see below), whose sum is σ = 1419552. Its totient is φ = 456960.

The previous prime is 871993. The next prime is 872017. The reversal of 871995 is 599178.

It is a happy number.

It is not a de Polignac number, because 871995 - 2¹ = 871993 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (871993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439 + ... + 1391.

It is an arithmetic number, because the mean of its divisors is an integer number (88722).

2⁸⁷¹⁹⁹⁵ is an apocalyptic number.

871995 is a deficient number, since it is larger than the sum of its proper divisors (547557).

871995 is a wasteful number, since it uses less digits than its factorization.

871995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022.

The product of its digits is 22680, while the sum is 39.

The square root of 871995 is about 933.8067251846. The cubic root of 871995 is about 95.5369410188.

The spelling of 871995 in words is "eight hundred seventy-one thousand, nine hundred ninety-five".