The 4 is in the thousands column, so it is worth 4 x 1000 = four thousand.
A credit card that starts with the number 4003 is typically a Visa card. The first digit of a credit card number indicates the card network; for Visa, this is always a 4. However, to confirm the specific type and issuer of the card, additional digits would be necessary.
40030
Although the 4003 is kind of an improved 4001, still many bassists prefer the 4001, finally discontinued in the 80's. I guess it's personal preferences cause the 4003 is a great quality instrument.
There are 210 4 digit combinations and 5040 different 4 digit codes.
There are 90 four-digit palindromes
120
17
4
4,008,004 - 4,004,001 = 4003
24 = 4*3*2*1
4003
4003