$4^5$ means multiplying 4 by itself five times:

$4^5 = 4 \times 4 \times 4 \times 4 \times 4 = 1024$

So, $4^5 = 1024$.

Would you like to see how exponentiation works in general or have any further questions?

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Here are five related questions you might find interesting:

1. What is $4^6$ and how does it differ from $4^5$?
2. How does $4^5$ compare to $5^4$?
3. What is the value of $4^{-5}$?
4. Can you express $1024$ in terms of other powers?
5. How does exponentiation behave for fractions or decimals?

Tip: Any number raised to the power of 0 is always 1 (e.g., $4^0 = 1$).