518442 has 16 divisors (see below), whose sum is σ = 1052352. Its totient is φ = 170240.

The previous prime is 518431. The next prime is 518447. The reversal of 518442 is 244815.

518442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (518447) by changing a digit.

518442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 183 + ... + 1034.

It is an arithmetic number, because the mean of its divisors is an integer number (65772).

2⁵¹⁸⁴⁴² is an apocalyptic number.

518442 is an abundant number, since it is smaller than the sum of its proper divisors (533910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

518442 is a wasteful number, since it uses less digits than its factorization.

518442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293.

The product of its digits is 1280, while the sum is 24.

The square root of 518442 is about 720.0291660759. The cubic root of 518442 is about 80.3341234099.

The spelling of 518442 in words is "five hundred eighteen thousand, four hundred forty-two".