1265

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1265 < 1264 | 1266 >
All Numbers
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1265 is the number following 1264 and preceding 1266.

Properties

• Its factors are 1, 5, 11, 23, 55, 115, 253 and 1265, making it a composite number. It is also a squarefree number.
• 1265 is an odd number .
• 1265 is an unhappy number.
  

• 1265 is deficient.
  
• Its prime factorization is 5¹ × 11¹ × 23¹.
  

Approximations

Notation	Lower bound	Upper bound
Up-arrow notation	36 ↑ 2
Scientific notation	1.265 x 103	1.266 x 103
Slow-growing hierarchy	\(g_{\omega^{\omega}}(4)\)	\(g_{\omega^{\omega}}(5)\)
Copy notation	12[2]	13[2]
Chained arrow notation	36 → 2
Bowers' Exploding Array Function/Bird's array notation	{36,2}
Fast-growing hierarchy	f2(7)	f2(8)
Hardy hierarchy	Hω(632)	Hω(633)
Middle-growing hierarchy	m(ω,10)	m(ω,11)
Hyper-E notation	E3.1021
Hyper-E notation (non-10 base)	\(E[36]2\)
Hyperfactorial array notation	6!	7!
X-Sequence Hyper-Exponential Notation	36{1}2
Steinhaus-Moser Notation	4[3]	5[3]
PlantStar's Debut Notation	[1]	[2]
H* function	H(0)	H(0.1)
Bashicu matrix system with respect to version 4	(0)[35]	(0)[36]
m(n) map	m(1)(4)	m(1)(5)
s(n) map	\(s(1)(\lambda x . x+1)(631)\)	\(s(1)(\lambda x . x+1)(632)\)