505685 has 8 divisors (see below), whose sum is σ = 638880. Its totient is φ = 383184.

The previous prime is 505669. The next prime is 505691. The reversal of 505685 is 586505.

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 505685 - 2⁴ = 505669 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2567 + ... + 2756.

It is an arithmetic number, because the mean of its divisors is an integer number (79860).

2⁵⁰⁵⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

505685 is a deficient number, since it is larger than the sum of its proper divisors (133195).

505685 is a wasteful number, since it uses less digits than its factorization.

505685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5347.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 505685 is about 711.1153211681. The cubic root of 505685 is about 79.6697321658.

The spelling of 505685 in words is "five hundred five thousand, six hundred eighty-five".