Problem of the Week 1: What number am I?

What number am I?

• I am a number between 1 and 100 000 000.
• I have eight digits, and no digits are repeated.
  
• The digit in the thousands place is one-half the digit in the millions place and twice the digit in the tens place.
  
• The digit in the tens place is 1.
  
• The digit in the ten thousands place is one less than the digit in the ten place.
  
• There are 3 ten millions in the number.
  
• The digit in the hundred thousands is twice the number of ten millions.
  
• If you add the number of ten millions and the millions, you will get the digit in the hundreds place.
  
• The one digit is two less than the hundreds digit.