4181
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Number
$4181$ (four thousand, one hundred and eighty-one) is:
- $37 \times 113$
- The first composite Fibonacci number with a prime index:
- $4181 = 37 \times 113$
- The $19$th Fibonacci number, after $1$, $1$, $2$, $3$, $5$, $8$, $13$, $21$, $34$, $55$, $89$, $144$, $233$, $377$, $610$, $987$, $1597$, $2584$:
- $4181 = 1597 + 2584$
Also see
- Previous ... Next: Fibonacci Number
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $4181$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $4181$