nBABs (number Basic Arithmetic Bits) turned six years of age on 22 April 2011 and whe nBAB count was

`on that date.`

421MathBabbler Number Analyst (MBNA) output: ========================================= 421 is a natural, whole, integer 421 is odd 421 proper divisors are: 1, 421 is deficient (sum of divisors is 1) 421 is unhappy 421 is not a Harshad number 421 is prime ...Twin prime with 419 ...Pythagorean 421 is a lucky number 421 is the sum of 5 consecutive primes 421 = 73 + 79 + 83 + 89 + 97 421 in octal is 0645 421 in hexadecimal is 0x1a5 421 in binary is 110100101 (is odious) 421 nearest square numbers: -21...20 (400...441 [21]) sqrt(421) = 20.5183 ln(421) = 6.04263 log(421) = 2.62428 421 reciprocal is .00237529691211401425178147268408 421! is 4.96709e+923 421 is 134.008 Pi years 421 is 21 score and 1 year 421 written as a Roman numeral is CDXXI 421 = 211^2 - 210^2 and 211 + 210 = 421

`equals repdigit number 111.`

421_{5}

`equals palindromic number 343.`

421_{9}

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 24 April 2011

This work is licensed under a Creative Commons Attribution 3.0 United States License.