216042 has 8 divisors (see below), whose sum is σ = 432096. Its totient is φ = 72012.

The previous prime is 216037. The next prime is 216061. The reversal of 216042 is 240612.

216042 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

216042 is an admirable number.

It is an unprimeable number.

216042 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 3 ways as a sum of consecutive naturals, for example, 17998 + ... + 18009.

It is an arithmetic number, because the mean of its divisors is an integer number (54012).

216042 is a Friedman number, since it can be written as 60^(2+1)+42, using all its digits and the basic arithmetic operations.

2²¹⁶⁰⁴² is an apocalyptic number.

216042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216042 is a wasteful number, since it uses less digits than its factorization.

216042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36012.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 216042 is about 464.8031841543. The cubic root of 216042 is about 60.0038886369.

Adding to 216042 its reverse (240612), we get a palindrome (456654).

The spelling of 216042 in words is "two hundred sixteen thousand, forty-two".