odd, composite · 921st positive integer
The number 921
921 is an odd composite number. It is the 921st positive integer.
Quick reference
| Prime factorization | 3 × 307 |
| Divisors | 1, 3, 307, 921 |
| Binary | 1110011001 |
| Hexadecimal | 0x399 |
| Roman numeral | CMXXI |
| Digit sum | 12 |
| Properties | odd, composite |
Reading 921 in NumGrid context
921 is one of the data points covered by this site’s integer properties and number-guessing puzzles dataset. The detail above comes directly from classical number theory plus NumGrid solver-derived puzzle statistics; the context that follows situates the headline numbers against the broader distribution across positive integers within the NumGrid target pool.
Every number on this page links back to classical number theory plus NumGrid solver-derived puzzle statistics; the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for 921’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 921 a prime number?
No. 921 is composite. Its prime factorization is 3 × 307.
What are the factors of 921?
The factors (divisors) of 921 are 1, 3, 307, 921.
What is 921 in binary?
921 in binary is 1110011001. In hexadecimal it's 399.
What is 921 as a Roman numeral?
921 in Roman numerals is CMXXI.
What's the digit sum of 921?
Adding the digits of 921: 9 + 2 + 1 = 12.