518842 has 4 divisors (see below), whose sum is σ = 778266. Its totient is φ = 259420.

The previous prime is 518831. The next prime is 518863. The reversal of 518842 is 248815.

518842 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 395641 + 123201 = 629^2 + 351^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 518842.

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 as a sum of consecutive naturals, namely, 129709 + ... + 129712.

2⁵¹⁸⁸⁴² is an apocalyptic number.

518842 is a deficient number, since it is larger than the sum of its proper divisors (259424).

518842 is a wasteful number, since it uses less digits than its factorization.

518842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259423.

The product of its digits is 2560, while the sum is 28.

The square root of 518842 is about 720.3068790453. The cubic root of 518842 is about 80.3547784936.

The spelling of 518842 in words is "five hundred eighteen thousand, eight hundred forty-two".