142078 has 4 divisors (see below), whose sum is σ = 213120. Its totient is φ = 71038.

The previous prime is 142067. The next prime is 142097. The reversal of 142078 is 870241.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35518 + ... + 35521.

It is an arithmetic number, because the mean of its divisors is an integer number (53280).

2¹⁴²⁰⁷⁸ is an apocalyptic number.

142078 is a deficient number, since it is larger than the sum of its proper divisors (71042).

142078 is an equidigital number, since it uses as much as digits as its factorization.

142078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71041.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 142078 is about 376.9323546739. The cubic root of 142078 is about 52.1805851572.

It can be divided in two parts, 14 and 2078, that multiplied together give a palindrome (29092).

The spelling of 142078 in words is "one hundred forty-two thousand, seventy-eight".