505239 has 16 divisors (see below), whose sum is σ = 787200. Its totient is φ = 288120.

The previous prime is 505237. The next prime is 505277. The reversal of 505239 is 932505.

It is not a de Polignac number, because 505239 - 2¹ = 505237 is a prime.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505231) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 784 + ... + 1274.

It is an arithmetic number, because the mean of its divisors is an integer number (49200).

2⁵⁰⁵²³⁹ is an apocalyptic number.

505239 is a deficient number, since it is larger than the sum of its proper divisors (281961).

505239 is an equidigital number, since it uses as much as digits as its factorization.

505239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 505239 is about 710.8016600994. The cubic root of 505239 is about 79.6463031194.

The spelling of 505239 in words is "five hundred five thousand, two hundred thirty-nine".