Numbers / 901

The Number 901

901 is composite: factorization 17 × 53. That gives 901 exactly 4 divisors: 1, 17, 53, 901. 901's proper divisors total just 71, 830 short of 901, the deficient case most of 901's neighbors share too. 901 has a digit sum of 10; for 901, the digital root works out to 1. 901 shares no factor with 2-12; 901's own divisors start beyond that range. 901 is 1110000101 in binary and 385 in hex; as a Roman numeral it's CMI.