### About the Number 1,801 (one thousand eight hundred one)

When MathBabbler was a kid, his dad's work phone number was 838-1801.

```MathBabbler Number Analyst (MBNA) output:
=========================================
1801 is natural, counting, whole, integer
1801 is odd (not even)
1801 is not extremely odd
1801 proper divisors are: 1,
1801 has 1 proper divisors
1801 is deficient (sum of divisors is 1; ratio: 0.000555247)
1801 is unhappy
1801 is a Squarefree Number
1801 is prime (not composite)
...Truman Gerald (p+30) prime with 1831
...Pythagorean prime
...Strong prime
1801 is an additive pointer prime
1801 is a lucky number
1801 is Arithmetic (A003601)
1801 is the sum of 9 consecutive primes
1801 = 179 + 181 + 191 + 193 + 197 + 199 + 211 + 223 + 227
1801 in octal is 03411
1801 in hexadecimal is 0x709
1801 in binary is 11100001001 (is odious)
1801 nearest square numbers: -37...48 (1764...1849 )
sqrt(1801) = 42.4382
ln(1801) = 7.4961
log(1801) = 3.25551
1801! is inf
1801 is 573.276 Pi years
1801 is 90 score and 1 year
1801 written as a Roman numeral is MDCCCI
1801 is 901^2 - 900^2 and 901 + 900 = 1801
1801 is a multiple of 1 & it contains a 1 (A011531)
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1801 reciprocal is 0.000555247084952803997779011660188784008883953359244863964464186563020544142143253747917823431426985008328706274292059966685174902831760133259300388672959466962798445308162132148806218767351471404775124930594114380899500277623542476401998889505830094392004441976679622431982232093281510272071071626873958911715713492504164353137146029983342587451415880066629650194336479733481399222654081066074403109383675735702387562465297057190449750138811771238200999444752915047196002220988339811215991116046640755136035535813436979455857856746252082176568573014991671293725707940033314825097168239866740699611327040533037201554691837867851193781232648528595224875069405885619100499722376457523598001110494169905607995558023320377568017767906718489727928928373126041088284286507495835646862853970016657412548584119933370349805663520266518600777345918933925596890616324264297612437534702942809550249861188228761799
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 29 September 2016 