871946 has 4 divisors (see below), whose sum is σ = 1307922. Its totient is φ = 435972.

The previous prime is 871931. The next prime is 871957. The reversal of 871946 is 649178.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 649178 = 2 ⋅324589.

It can be written as a sum of positive squares in only one way, i.e., 829921 + 42025 = 911^2 + 205^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217985 + ... + 217988.

2⁸⁷¹⁹⁴⁶ is an apocalyptic number.

871946 is a deficient number, since it is larger than the sum of its proper divisors (435976).

871946 is a wasteful number, since it uses less digits than its factorization.

871946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435975.

The product of its digits is 12096, while the sum is 35.

The square root of 871946 is about 933.7804881234. The cubic root of 871946 is about 95.5351514834.

The spelling of 871946 in words is "eight hundred seventy-one thousand, nine hundred forty-six".