Given an integer consisting of digits in base , let
The digital root of is always 1 for any natural , while the digital root of (where is another natural number) is the same as the digital root of . This should not be taken to imply that the digital root is necessarily a multiplicative function.
The digital root of an integer of the form is always .
Another way to calculate the digital root for is with the formula .
|Date of creation||2013-03-22 15:59:34|
|Last modified on||2013-03-22 15:59:34|
|Last modified by||PrimeFan (13766)|
|Synonym||repeated digit sum|
|Synonym||repeated digital sum|