505859 has 4 divisors (see below), whose sum is σ = 508200. Its totient is φ = 503520.

The previous prime is 505823. The next prime is 505867. The reversal of 505859 is 958505.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505859 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 505859.

It is not an unprimeable number, because it can be changed into a prime (505819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809 + ... + 1290.

It is an arithmetic number, because the mean of its divisors is an integer number (127050).

2⁵⁰⁵⁸⁵⁹ is an apocalyptic number.

505859 is a deficient number, since it is larger than the sum of its proper divisors (2341).

505859 is a wasteful number, since it uses less digits than its factorization.

505859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 505859 is about 711.2376536714. The cubic root of 505859 is about 79.6788689101.

The spelling of 505859 in words is "five hundred five thousand, eight hundred fifty-nine".