42318 has 12 divisors (see below), whose sum is σ = 91728. Its totient is φ = 14100.

The previous prime is 42307. The next prime is 42323. The reversal of 42318 is 81324.

It is a happy number.

42318 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2351 = 42318 / (4 + 2 + 3 + 1 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 42318.

It is a congruent number.

It is an unprimeable number.

42318 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1158 + ... + 1193.

It is an arithmetic number, because the mean of its divisors is an integer number (7644).

2⁴²³¹⁸ is an apocalyptic number.

42318 is an abundant number, since it is smaller than the sum of its proper divisors (49410).

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

42318 is a wasteful number, since it uses less digits than its factorization.

42318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2359 (or 2356 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 42318 is about 205.7133928552. The cubic root of 42318 is about 34.8477742575.

It can be divided in two parts, 423 and 18, that added together give a square (441 = 21²).

The spelling of 42318 in words is "forty-two thousand, three hundred eighteen".