6*5*4*3*2*1=720
it is 111123
-1,112,198 is.
111123
As a product of its prime factors: 111123 = 2783
If you add the digits in any given number and they add up to 9, then that number is divisible by nine. Example: 72 = 7 + 2 = 9, therefore its divisible by 9 Example: 2034 = 2 + 0 + 3 + 4 = 9, therefore it's divisible by nine as well. Example: 111123 = 1+1+1+1+2+3 = 9, therefore it is divisible by 9, too.
1 Through 9 to 9 Through 1:1 x 8 + 1 = 912 x 8 + 2 = 98123 x 8 + 3 = 9871234 x 8 + 4 = 987612345 x 8 + 5 = 98765123456 x 8 + 6 = 9876541234567 x 8 + 7 = 987654312345678 x 8 + 8 = 98765432123456789 x 8 + 9 = 987654321Sequential Input to All 1's:1 x 9 + 2 = 1112 x 9 + 3 = 111123 x 9 + 4 = 11111234 x 9 + 5 = 1111112345 x 9 + 6 = 111111123456 x 9 + 7 = 11111111234567 x 9 + 8 = 1111111112345678 x 9 + 9 = 111111111123456789 x 9 + 10 = 1111111111All 1's to a Numeric Palindrome:1 x 1 = 111 x 11 = 121111 x 111 = 123211111 x 1111 = 123432111111 x 11111 = 123454321111111 x 111111 = 123456543211111111 x 1111111 = 123456765432111111111 x 11111111 = 123456787654321111111111 x 111111111 = 12345678987654321