166142 has 4 divisors (see below), whose sum is σ = 249216. Its totient is φ = 83070.

The previous prime is 166099. The next prime is 166147. The reversal of 166142 is 241661.

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 inconsummate number, since it does not exist a number n which divided by its sum of digits gives 166142.

It is not an unprimeable number, because it can be changed into a prime (166147) by changing a digit.

166142 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, 41534 + ... + 41537.

It is an arithmetic number, because the mean of its divisors is an integer number (62304).

2¹⁶⁶¹⁴² is an apocalyptic number.

166142 is a deficient number, since it is larger than the sum of its proper divisors (83074).

166142 is an equidigital number, since it uses as much as digits as its factorization.

166142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83073.

The product of its digits is 288, while the sum is 20.

The square root of 166142 is about 407.6052011444. The cubic root of 166142 is about 54.9743130740.

The spelling of 166142 in words is "one hundred sixty-six thousand, one hundred forty-two".