Numbers / 265

The Number 265

265 is composite: factorization 5 × 53. That gives 265 exactly 4 divisors: 1, 5, 53, 265. 265's proper divisors total just 59, 206 short of 265, the deficient case most of 265's neighbors share too. 265 has a digit sum of 13; for 265, the digital root works out to 4. 265: 5 all divide 265 evenly, out of 2-12. 265 is 100001001 in binary and 109 in hex; as a Roman numeral it's CCLXV.