About the Number 1621 (one thousand six hundred twenty-one)

This nBAB was created on Thanksgiving Day 2008. There is debate about what year the first Thanksgiving took place: 1565 or 1621? MathBabbler avoided the contention by creating this nBAB for 1621 and another nBAB for 1565.

   MathBabbler Number Analyst (MBNA) output:
   =========================================
   1621 is a natural, whole, integer
   1621 is odd
   1621 is unhappy
   1621 is not a Harshad number
   1621 is prime
   ...Sexy prime with 1627
   ...Twin prime with 1619
   ...Pythagorean
   ...Super
   1621 in octal is 03125
   1621 in hexadecimal is 0x655
   1621 in binary is 11001010101 (is evil)
   1621 nearest square numbers: -21...60 (1600 [40]...1681 [41])
   sqrt(1621) = 40.2616
   ln(1621) = 7.3908
   log(1621) = 3.20978
   1621 reciprocal is .00061690314620604565083281924737
   1621! is 1.17738e+4501
   1621 is 515.98 Pi years
   1621 is 81 score and 1 year

1621 written as Roman numeral is MDCXXI.


Creator: Gerald Thurman [gthurman@gmail.com]
Created: 27 November 2008 (nBAB# 78)

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