18142 has 8 divisors (see below), whose sum is σ = 27936. Its totient is φ = 8832.

The previous prime is 18133. The next prime is 18143. The reversal of 18142 is 24181.

It is a happy number.

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

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18143) by changing a digit.

18142 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 3 ways as a sum of consecutive naturals, for example, 3 + ... + 190.

It is an arithmetic number, because the mean of its divisors is an integer number (3492).

2¹⁸¹⁴² is an apocalyptic number.

18142 is a deficient number, since it is larger than the sum of its proper divisors (9794).

18142 is a wasteful number, since it uses less digits than its factorization.

18142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242.

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

The square root of 18142 is about 134.6922417959. The cubic root of 18142 is about 26.2761493014.

It can be divided in two parts, 18 and 142, that multiplied together give a triangular number (2556 = T₇₁).

The spelling of 18142 in words is "eighteen thousand, one hundred forty-two".