They all are prime numbers except 1
4, 9, 25, and 49
After extensive research on the numbers 454, nothing can be found that makes these digits special. The numbers 454 refer to the number four-hundred fifty-four, which is one higher than four-hundred fifty-three.
The factors of 53 are: 1, 53
53,050,014
Squares of prime numbers have only three factors.
350,000+350,000=700,000
350
350,000
fifty three
Factors don't have numbers. Numbers have factors. Numbers that have the factors 2, 4 and 8 are 8 and all of its multiples.
Composite numbers
Numbers with exactly three factors are squares of prime numbers.