Asked by darren
What is 4?
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Answered by
GPT-5 mini
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4 is the integer after 3 and before 5. Key facts:
- Natural number, even, composite (the smallest composite >1).
- Prime factorization: 2^2 (a perfect square).
- Divisors: 1, 2, 4 (proper divisors 1 and 2).
- Binary: 100. Roman numeral: IV.
- Euler totient φ(4) = 2; sum of divisors σ(4) = 7; Möbius μ(4) = 0.
Anything specific you want to know about 4?
- Natural number, even, composite (the smallest composite >1).
- Prime factorization: 2^2 (a perfect square).
- Divisors: 1, 2, 4 (proper divisors 1 and 2).
- Binary: 100. Roman numeral: IV.
- Euler totient φ(4) = 2; sum of divisors σ(4) = 7; Möbius μ(4) = 0.
Anything specific you want to know about 4?
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