10,234 is the smallest 5-digit number meeting your restrictions.
id say, 0123456789. but depends how many digits you can have
12345 but if you can use a decimal, then 0.1234 would be the smallest possible number.
4/15 as a decimal is 0.26666 repeating
4111 is an integer and so there is no sensible way to convert it into a repeating decimal.
It is a repeating decimal.