Q: Is 745,409 a Catalan Number?

 A: No, the number 745,409 is not a Catalan number.

Here are the next few Catalan numbers

2,674,440 9,694,845 35,357,670 129,644,790 477,638,700

Are any of the surrounding numbers a Catalan number?

Let's take a look and see...

Number 745,407745,408745,410745,411
Catalan? nononono

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