875861 has 8 divisors (see below), whose sum is σ = 1007424. Its totient is φ = 745920.

The previous prime is 875851. The next prime is 875893. The reversal of 875861 is 168578.

It is a happy number.

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

It is not a de Polignac number, because 875861 - 2¹⁴ = 859477 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (875821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1181 + ... + 1773.

It is an arithmetic number, because the mean of its divisors is an integer number (125928).

2⁸⁷⁵⁸⁶¹ is an apocalyptic number.

It is an amenable number.

875861 is a deficient number, since it is larger than the sum of its proper divisors (131563).

875861 is a wasteful number, since it uses less digits than its factorization.

875861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811.

The product of its digits is 13440, while the sum is 35.

The square root of 875861 is about 935.8744573927. The cubic root of 875861 is about 95.6779209256.

Subtracting from 875861 its sum of digits (35), we obtain a triangular number (875826 = T₁₃₂₃).

The spelling of 875861 in words is "eight hundred seventy-five thousand, eight hundred sixty-one".