### About the Number 401 (four hundred one)

The Numberphile posted a video for the number 400. There were already nBABs for 400 and 400-1, so this nBAB for the number 400+1 was created.

```   MathBabbler Number Analyst (MBNA) output:
=========================================
401 is a natural, whole, integer
401 is odd
401 proper divisors are: 1,
401 is deficient (sum of divisors is 1)
401 is unhappy
401 is a Squarefree Number
401 is not a Harshad number
401 is prime
...Cousin prime with 397
...Truman Gerald prime with 431
...Pythagorean
...Super
...Eisenstein
401 is the sum of 9 consecutive primes
401 = 29 + 31 + 37 + 41 + 43 + 47 + 53 + 59 + 61
401 in octal is 0621
401 in hexadecimal is 0x191
401 in binary is 110010001 (is evil)
401 nearest square numbers: -1...40 (400...441 )
sqrt(401) = 20.025
ln(401) = 5.99396
log(401) = 2.60314
401 reciprocal is .00249376558603491271820448877805
401! is 2.56778e+871
401 is 127.642 Pi years
401 is 20 score and 1 year
401 written as a Roman numeral is CDI
401 = 201^2 - 200^2 and 201 + 200 = 401
```

`log9(401)` = 2.72797, which when down to the nearest hundredth equals e rounded up to the nearest hundredth.

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 15 November 2012 