| Base 10 | 3873 (4 digits) | ||
| Digit Sum: 21 | Digital Root: 3 | sad | |
| Base 2 | 0b111100100001 (12 digits) | ||
| Digit Sum: 0b110 | Digital Root: 0b1 | always happy | |
| Base 8 | 07441 (4 digits) | ||
| Digit Sum: 020 | Digital Root: 02 | sad | |
| Base 16 | 0xf21 (3 digits) | ||
| Digit Sum: 0x12 | Digital Root: 0x3 | happy | |
More about this number at Positiv Integers and Number Empire.
The number is not a prime.
Its 2 (2 unique) factors are:
3
1291
Its 4 divisors are:
1
3
1291
3873
Its aliquote sum is: 
1295
makeing it a
deficient
number.
| In HTML this number represents this color: | 
 ⇧↑⇧↑⇧↑ #000F21 ⇩↓⇩↓⇩↓  | 
As Unicode codepoint (since version 2.0) this number represents this character:༡ TIBETAN DIGIT ONE in Tibetan (Source: https://www.unicode.org/Public/UCD/latest/ucdxml/ucd.all.grouped.zip); HTML: ༡
The number appears at position 3574 of the decimal digits of π surrounded by
55650884909989859982387345528331635507647918 Source: The Pi-Search Page
Computations done with Math::BigInt 1.999811 and Math::Pari 2.030523 based on PARI/GP 2.11.3 (elapsed: 675.496ms; cpu: 67.6629999999996ms)