876861 has 6 divisors (see below), whose sum is σ = 1266590. Its totient is φ = 584568.

The previous prime is 876853. The next prime is 876871. The reversal of 876861 is 168678.

It can be written as a sum of positive squares in only one way, i.e., 783225 + 93636 = 885^2 + 306^2 .

It is not a de Polignac number, because 876861 - 2³ = 876853 is a prime.

It is a Duffinian number.

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 (876851) 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 5 ways as a sum of consecutive naturals, for example, 48706 + ... + 48723.

2⁸⁷⁶⁸⁶¹ is an apocalyptic number.

It is an amenable number.

876861 is a deficient number, since it is larger than the sum of its proper divisors (389729).

876861 is a wasteful number, since it uses less digits than its factorization.

876861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97435 (or 97432 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 876861 is about 936.4085646768. The cubic root of 876861 is about 95.7143199779.

The spelling of 876861 in words is "eight hundred seventy-six thousand, eight hundred sixty-one".