505785 has 16 divisors (see below), whose sum is σ = 925056. Its totient is φ = 231168.

The previous prime is 505781. The next prime is 505811. The reversal of 505785 is 587505.

It is a happy number.

It is not a de Polignac number, because 505785 - 2² = 505781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2304 + ... + 2513.

It is an arithmetic number, because the mean of its divisors is an integer number (57816).

2⁵⁰⁵⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

505785 is a deficient number, since it is larger than the sum of its proper divisors (419271).

505785 is a wasteful number, since it uses less digits than its factorization.

505785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4832.

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 505785 is about 711.1856297761. The cubic root of 505785 is about 79.6749834243.

The spelling of 505785 in words is "five hundred five thousand, seven hundred eighty-five".