Numbers 740,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

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741,195

[Math.]  Two consecutive sums of consecutive numbers:

8100+…+8190 = 8191+…+8280 = 741,195.

 

741,321

[Math.]  Sum of the first 41 cube numbers:

13+23+…+403+413 = 741,321 = (1+2+…+40+41)2 = 8612.

 

742,900

[Math.]  A Catalan number: C13 = 742,900.

 

748,657

[Math.]  A Carmichael number: 748,657 = 7×13×19×433.