870859 has 8 divisors (see below), whose sum is σ = 1006128. Its totient is φ = 744960.

The previous prime is 870853. The next prime is 870871. The reversal of 870859 is 958078.

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 870859 - 2⁷ = 870731 is a prime.

870859 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (870853) 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, 2142 + ... + 2515.

It is an arithmetic number, because the mean of its divisors is an integer number (125766).

2⁸⁷⁰⁸⁵⁹ is an apocalyptic number.

870859 is a deficient number, since it is larger than the sum of its proper divisors (135269).

870859 is a wasteful number, since it uses less digits than its factorization.

870859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4685.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 870859 is about 933.1982640361. The cubic root of 870859 is about 95.4954357622.

The spelling of 870859 in words is "eight hundred seventy thousand, eight hundred fifty-nine".