what is 142,000 in exponential form

142,000 in exponential form = 1.42*10^-5

Your question is not clear. If you want it to base "e", then:

142,000 =e^11.8635.........

If you want it to base 10, then:

142,000 = 10^5.1523.........

If you want its prime factors, then:

142,000 = 2^4 * 5^3 * 71