Numbers / 417

The Number 417

417 is composite: factorization 3 × 139. That gives 417 exactly 4 divisors: 1, 3, 139, 417. 417's proper divisors total just 143, 274 short of 417, the deficient case most of 417's neighbors share too. 417 has a digit sum of 12; for 417, the digital root works out to 3. 417: 3 all divide 417 evenly, out of 2-12. 417 is 110100001 in binary and 1A1 in hex; as a Roman numeral it's CDXVII.