Numbers / 249

The Number 249

249 is composite: factorization 3 × 83. That gives 249 exactly 4 divisors: 1, 3, 83, 249. 249's proper divisors total just 87, 162 short of 249, the deficient case most of 249's neighbors share too. 249 has a digit sum of 15; for 249, the digital root works out to 6. 249: 3 all divide 249 evenly, out of 2-12. 249 is 11111001 in binary and F9 in hex; as a Roman numeral it's CCXLIX.