Q: What is the digital root of 1,638,421

 A: 7

Why is 7 the digital root of the number 1,638,421?

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 1,638,421?


Split the number up and add each digit together:


1 + 6 + 3 + 8 + 4 + 2 + 1 = 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 1,638,421?

Answer: 7


More Examples

Number 1,638,4191,638,4201,638,4221,638,423
Digital Root 5689

Explore more about the number 1,638,421:


Ask a Question