142978 has 16 divisors (see below), whose sum is σ = 239904. Its totient is φ = 63360.

The previous prime is 142973. The next prime is 142979. The reversal of 142978 is 879241.

It is not an unprimeable number, because it can be changed into a prime (142973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1426 + ... + 1522.

It is an arithmetic number, because the mean of its divisors is an integer number (14994).

142978 is a Friedman number, since it can be written as 71489*2, using all its digits and the basic arithmetic operations.

2¹⁴²⁹⁷⁸ is an apocalyptic number.

142978 is a deficient number, since it is larger than the sum of its proper divisors (96926).

142978 is a wasteful number, since it uses less digits than its factorization.

142978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177.

The product of its digits is 4032, while the sum is 31.

The square root of 142978 is about 378.1243181812. The cubic root of 142978 is about 52.2905334767.

It can be divided in two parts, 14 and 2978, that added together give a palindrome (2992).

The spelling of 142978 in words is "one hundred forty-two thousand, nine hundred seventy-eight".