knowing our numbers

1234567
Across
  1. 2. value of Indian system equivalent to 1 million.
  2. 5. General five digit number using 9 8 7.
  3. 6. expressing a number that is one less than hundred in words.
  4. 7. greatest one digit number.
Down
  1. 1. number of zeros in one thousand.
  2. 2. successor of 1037 8695.
  3. 3. place of international system of numeration after ones and tens.
  4. 4. 2-4-6-?.