Numbers / 757

The Number 757

757 is prime: only 1 and 757 divide it evenly; the next prime after 757 is 761. 757's proper divisors total just 1, 756 short of 757, the deficient case most of 757's neighbors share too. 757 is also a palindrome, since 757 reads identically forwards and backwards. 757 has a digit sum of 19; for 757, the digital root works out to 1. 757 shares no factor with 2-12; 757's own divisors start beyond that range. 757 is 1011110101 in binary and 2F5 in hex; as a Roman numeral it's DCCLVII.