871951 has 4 divisors (see below), whose sum is σ = 884304. Its totient is φ = 859600.

The previous prime is 871931. The next prime is 871957. The reversal of 871951 is 159178.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 159178 = 2 ⋅79589.

It is a cyclic number.

It is not a de Polignac number, because 871951 - 2⁵ = 871919 is a prime.

It is a Duffinian number.

871951 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871957) 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, 6070 + ... + 6211.

It is an arithmetic number, because the mean of its divisors is an integer number (221076).

2⁸⁷¹⁹⁵¹ is an apocalyptic number.

871951 is a deficient number, since it is larger than the sum of its proper divisors (12353).

871951 is a wasteful number, since it uses less digits than its factorization.

871951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12352.

The product of its digits is 2520, while the sum is 31.

The square root of 871951 is about 933.7831654083. The cubic root of 871951 is about 95.5353340921.

The spelling of 871951 in words is "eight hundred seventy-one thousand, nine hundred fifty-one".