42118 has 4 divisors (see below), whose sum is σ = 63180. Its totient is φ = 21058.

The previous prime is 42101. The next prime is 42131. The reversal of 42118 is 81124.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

42118 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 as a sum of consecutive naturals, namely, 10528 + ... + 10531.

It is an arithmetic number, because the mean of its divisors is an integer number (15795).

2⁴²¹¹⁸ is an apocalyptic number.

42118 is a deficient number, since it is larger than the sum of its proper divisors (21062).

42118 is a wasteful number, since it uses less digits than its factorization.

42118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21061.

The product of its digits is 64, while the sum is 16.

The square root of 42118 is about 205.2267039155. The cubic root of 42118 is about 34.7927892754.

The spelling of 42118 in words is "forty-two thousand, one hundred eighteen".