142178 has 4 divisors (see below), whose sum is σ = 213270. Its totient is φ = 71088.

The previous prime is 142169. The next prime is 142183. The reversal of 142178 is 871241.

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

It can be written as a sum of positive squares in only one way, i.e., 142129 + 49 = 377^2 + 7^2 .

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142178.

It is an unprimeable number.

142178 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, 35543 + ... + 35546.

2¹⁴²¹⁷⁸ is an apocalyptic number.

142178 is a deficient number, since it is larger than the sum of its proper divisors (71092).

142178 is an equidigital number, since it uses as much as digits as its factorization.

142178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71091.

The product of its digits is 448, while the sum is 23.

The square root of 142178 is about 377.0649811372. The cubic root of 142178 is about 52.1928245252.

The spelling of 142178 in words is "one hundred forty-two thousand, one hundred seventy-eight".