large numbers

123456
Across
  1. 2. value as twenty lakh in international place value system.
  2. 5. of largest six digit number.
  3. 6. fourth period in International place value system.
Down
  1. 1. five digit number.
  2. 3. third period in Indian place value system.
  3. 4. value of 3 in 2435721.