even, composite · 642nd positive integer
The number 642
642 is an even composite number. It is the 642nd positive integer.
Quick reference
| Prime factorization | 2 × 3 × 107 |
| Divisors | 1, 2, 3, 6, 107, 214, 321, 642 |
| Binary | 1010000010 |
| Hexadecimal | 0x282 |
| Roman numeral | DCXLII |
| Digit sum | 12 |
| Properties | even, composite |
Reading 642 in NumGrid context
The 642 record above pulls directly from classical number theory plus NumGrid solver-derived puzzle statistics. What follows is the per-entity context — how 642 sits in the broader integer properties and number-guessing puzzles distribution and which underlying factors drive the headline numbers.
The methodology behind every numeric value on this page is publicly documented on the classical number theory plus NumGrid solver-derived puzzle statistics portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for 642’s peers within positive integers within the NumGrid target pool. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Frequently asked
Is 642 a prime number?
No. 642 is composite. Its prime factorization is 2 × 3 × 107.
What are the factors of 642?
The factors (divisors) of 642 are 1, 2, 3, 6, 107, 214, 321, 642.
What is 642 in binary?
642 in binary is 1010000010. In hexadecimal it's 282.
What is 642 as a Roman numeral?
642 in Roman numerals is DCXLII.
What's the digit sum of 642?
Adding the digits of 642: 6 + 4 + 2 = 12.