871966 has 4 divisors (see below), whose sum is σ = 1307952. Its totient is φ = 435982.

The previous prime is 871963. The next prime is 871973. The reversal of 871966 is 669178.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871963) 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 as a sum of consecutive naturals, namely, 217990 + ... + 217993.

It is an arithmetic number, because the mean of its divisors is an integer number (326988).

2⁸⁷¹⁹⁶⁶ is an apocalyptic number.

871966 is a deficient number, since it is larger than the sum of its proper divisors (435986).

871966 is a wasteful number, since it uses less digits than its factorization.

871966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435985.

The product of its digits is 18144, while the sum is 37.

The square root of 871966 is about 933.7911972170. The cubic root of 871966 is about 95.5358819141.

The spelling of 871966 in words is "eight hundred seventy-one thousand, nine hundred sixty-six".