divisibility of 1722141
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It is divisible by 3
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sum of the digits = 1+7+2+2+1+4+1=18
sum of digits is 18
number is divisible by 3 and 9 if sum of digits is divisible by 3 and 9
therefore 18 is divisible by 3 and 9
therefore 1722141 is divisible by 3 and 9
sum of digits is 18
number is divisible by 3 and 9 if sum of digits is divisible by 3 and 9
therefore 18 is divisible by 3 and 9
therefore 1722141 is divisible by 3 and 9
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