245 (number)

← 244 245 246 →
← 240 241 242 243 244 245 246 247 248 249 → List of numbers Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	two hundred forty-five
Ordinal	245th (two hundred forty-fifth)
Factorization	5 × 72
Greek numeral	ΣΜΕ´
Roman numeral	CCXLV
Binary	111101012
Ternary	1000023
Senary	10456
Octal	3658
Duodecimal	18512
Hexadecimal	F516

245 (two hundred [and] forty-five) is the natural number following 244 and preceding 246.

Additionally, 245 is:

• a composite number.
• a stella octangula number.
• palindromic in bases 34 (77₃₄) and 48 (55₄₈) ^[1]
• a Harshad number in bases 7, 9, 11, 15, 31, 35, 36 (and 14 other bases). ^[2]
• the aliquot sum of any of these numbers: 723, 1195, 2563, 3859, ^[3] 9259, 10123, 12283, 14659 and 14803^{[ citation needed ]}
• part of the 97-aliquot tree. ^[3] The aliquot sequence starting at 10222 is: 10222, 5978,^{[ citation needed ]} 4624, 4893, 2595, 1581, 723, 245 ^[3] , 97, 1, 0^{[ citation needed ]}

References

1. "Double Base Palindrome". GeeksforGeeks. 2017-11-01. Retrieved 2021-09-13.
2. "Harshad (Or Niven) Number". GeeksforGeeks. 2016-11-19. Retrieved 2021-09-13.
3. Mathar, Richard J. (21 March 2014). "Illustration of Aliquot Sequence Mergers" (PDF). oeis.org. Archived (PDF) from the original on 2 August 2021. Retrieved 2 August 2021.