What is the nearest thousand to the number 14578 when rounded off?

The given number is 14578.

We have to round it off to the nearest thousands,

so if the units digit is 5 or more, increase the thousands digit by 1 and replace each digit on its right with 0.

but if the units digit is less than 5, the thousands digit remains the same and replaces each digit on its right with 0.

Here, in 14578, the digit at the units place is 8 which is greater than 5.

Therefore, to round off 14578 to the nearest thousands, we have to add 1 to the thousands digit and replace all digits after the thousands place with 0s.

So the answer is 15000.