505442 has 16 divisors (see below), whose sum is σ = 879360. Its totient is φ = 213408.

The previous prime is 505429. The next prime is 505447. The reversal of 505442 is 244505.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 878 + ... + 1334.

It is an arithmetic number, because the mean of its divisors is an integer number (54960).

2⁵⁰⁵⁴⁴² is an apocalyptic number.

505442 is a deficient number, since it is larger than the sum of its proper divisors (373918).

505442 is a wasteful number, since it uses less digits than its factorization.

505442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 505442 is about 710.9444422738. The cubic root of 505442 is about 79.6569687216.

Adding to 505442 its reverse (244505), we get a palindrome (749947).

The spelling of 505442 in words is "five hundred five thousand, four hundred forty-two".