Numbers / 541

The Number 541

541 is prime: only 1 and 541 divide it evenly; the next prime after 541 is 547. 541's proper divisors total just 1, 540 short of 541, the deficient case most of 541's neighbors share too. 541 has a digit sum of 10; for 541, the digital root works out to 1. 541 shares no factor with 2-12; 541's own divisors start beyond that range. 541 is 1000011101 in binary and 21D in hex; as a Roman numeral it's DXLI.