180142 has 4 divisors (see below), whose sum is σ = 270216. Its totient is φ = 90070.

The previous prime is 180137. The next prime is 180161. The reversal of 180142 is 241081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241081 = 491².

It is a super-2 number, since 2×180142² = 64902280328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

180142 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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45034 + ... + 45037.

It is an arithmetic number, because the mean of its divisors is an integer number (67554).

2¹⁸⁰¹⁴² is an apocalyptic number.

180142 is a deficient number, since it is larger than the sum of its proper divisors (90074).

180142 is an equidigital number, since it uses as much as digits as its factorization.

180142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90073.

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

The square root of 180142 is about 424.4313843250. The cubic root of 180142 is about 56.4770052876.

The spelling of 180142 in words is "one hundred eighty thousand, one hundred forty-two".