Number play

12345678910
Across
  1. 3. biggestfivedigitnumber
  2. 4. biggestthreedigitnumber
  3. 8. smallestfourdigitnumber
  4. 10. biggestfourdigitnumber
Down
  1. 1. kaprekarconstant
  2. 2. smallestsixdigitnumber
  3. 5. biggestsixdigitnumber
  4. 6. smallestthreedigitnumber
  5. 7. firstoddnumber
  6. 9. firstfivedigitnumber