Numbers / 601

The Number 601

601 is prime: only 1 and 601 divide it evenly; the next prime after 601 is 607. 601's proper divisors total just 1, 600 short of 601, the deficient case most of 601's neighbors share too. 601 has a digit sum of 7; for 601, the digital root works out to 7. 601 shares no factor with 2-12; 601's own divisors start beyond that range. 601 is 1001011001 in binary and 259 in hex; as a Roman numeral it's DCI.