Round 427,685 to the nearest thousand.

428,000

To round a number to the nearest thousand, you need to look at the hundreds place. In this case, the hundreds place is 7.

If the hundreds place is 5 or greater, you will round up to the next thousand. If it is less than 5, you will round down to the previous thousand.

In the number 427,685, the hundreds place is 7, which is greater than 5. Therefore, you round up to the next thousand, which is 428,000.