870559 has 4 divisors (see below), whose sum is σ = 873216. Its totient is φ = 867904.

The previous prime is 870547. The next prime is 870577. The reversal of 870559 is 955078.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 955078 = 2 ⋅477539.

It is a cyclic number.

It is not a de Polignac number, because 870559 - 2⁷ = 870431 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 (870589) 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, 754 + ... + 1519.

It is an arithmetic number, because the mean of its divisors is an integer number (218304).

2⁸⁷⁰⁵⁵⁹ is an apocalyptic number.

870559 is a deficient number, since it is larger than the sum of its proper divisors (2657).

870559 is a wasteful number, since it uses less digits than its factorization.

870559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 870559 is about 933.0375126435. The cubic root of 870559 is about 95.4844688430.

The spelling of 870559 in words is "eight hundred seventy thousand, five hundred fifty-nine".