Q: What is the digital root of 421,245,133

 A: 7

Why is 7 the digital root of the number 421,245,133?

The digital root of a number is calculated by splitting the digits of a number and then adding them together. You keep splitting and adding the digits until you reach a single positive number.

How do you calculate the digital root of 421,245,133?


Split the number up and add each digit together:


4 + 2 + 1 + 2 + 4 + 5 + 1 + 3 + 3 = 25

If the answer is more than one digit, you would add each digit of the answer together again:

2 + 5 = 7

What is the digital root of number 421,245,133?

Answer: 7


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