505659 has 24 divisors (see below), whose sum is σ = 851200. Its totient is φ = 261360.

The previous prime is 505657. The next prime is 505663. The reversal of 505659 is 956505.

It is a happy number.

It is not a de Polignac number, because 505659 - 2¹ = 505657 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 505659.

It is not an unprimeable number, because it can be changed into a prime (505657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2442 + ... + 2640.

2⁵⁰⁵⁶⁵⁹ is an apocalyptic number.

505659 is a deficient number, since it is larger than the sum of its proper divisors (345541).

505659 is a wasteful number, since it uses less digits than its factorization.

505659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 30.

The square root of 505659 is about 711.0970397913. The cubic root of 505659 is about 79.6683667251.

It can be divided in two parts, 5056 and 59, that added together give a palindrome (5115).

The spelling of 505659 in words is "five hundred five thousand, six hundred fifty-nine".