Numbers / 842

The Number 842

842 is composite: factorization 2 × 421. That gives 842 exactly 4 divisors: 1, 2, 421, 842. 842's proper divisors total just 424, 418 short of 842, the deficient case most of 842's neighbors share too. 842 has a digit sum of 14; for 842, the digital root works out to 5. 842: 2 all divide 842 evenly, out of 2-12. 842 is 1101001010 in binary and 34A in hex; as a Roman numeral it's DCCCXLII.