872861 has 8 divisors (see below), whose sum is σ = 966144. Its totient is φ = 781920.

The previous prime is 872843. The next prime is 872863. The reversal of 872861 is 168278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 872861 - 2¹⁰ = 871837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872863) 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 7 ways as a sum of consecutive naturals, for example, 260 + ... + 1346.

It is an arithmetic number, because the mean of its divisors is an integer number (120768).

2⁸⁷²⁸⁶¹ is an apocalyptic number.

It is an amenable number.

872861 is a deficient number, since it is larger than the sum of its proper divisors (93283).

872861 is a wasteful number, since it uses less digits than its factorization.

872861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171.

The product of its digits is 5376, while the sum is 32.

The square root of 872861 is about 934.2703034989. The cubic root of 872861 is about 95.5685572618.

The spelling of 872861 in words is "eight hundred seventy-two thousand, eight hundred sixty-one".