How do you write 4,001 in words?
4,001 = four thousand one
How to write $4,001 on a check
The most common reason to write 4,001 as four thousand one would be if you're writing a check for $4,001. Just below the "pay to the order of" line, you would write the dollar amount in words. In this case, you might write "four thousand one and 00/100 dollars."