142171 has 4 divisors (see below), whose sum is σ = 150552. Its totient is φ = 133792.

The previous prime is 142169. The next prime is 142183. The reversal of 142171 is 171241.

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

It is a cyclic number.

It is not a de Polignac number, because 142171 - 2¹ = 142169 is a prime.

142171 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (142111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4165 + ... + 4198.

It is an arithmetic number, because the mean of its divisors is an integer number (37638).

2¹⁴²¹⁷¹ is an apocalyptic number.

142171 is a deficient number, since it is larger than the sum of its proper divisors (8381).

142171 is an equidigital number, since it uses as much as digits as its factorization.

142171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8380.

The product of its digits is 56, while the sum is 16.

The square root of 142171 is about 377.0556988032. The cubic root of 142171 is about 52.1919679562.

It can be divided in two parts, 142 and 171, that added together give a palindrome (313).

The spelling of 142171 in words is "one hundred forty-two thousand, one hundred seventy-one", and thus it is an iban number.