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249 (number)

From Wikipedia, the free encyclopedia

249 (two hundred [and] forty-nine) is thenatural number following248 and preceding250.

Natural number
← 248249 250 →
Cardinaltwo hundred forty-nine
Ordinal249th
(two hundred forty-ninth)
Factorization3 × 83
Greek numeralΣΜΘ´
Roman numeralCCXLIX,ccxlix
Binary111110012
Ternary1000203
Senary10536
Octal3718
Duodecimal18912
HexadecimalF916

Additionally, 249 is:

  • aBlum integer.[1]
  • asemiprime.
  • palindromic in base 82 (3382).
  • aHarshad number in bases 3, 83, 84, 124, 167 and 247.
  • the aliquot sum of any of these numbers: 375, 531, 1687, 4351, 7807, 12127, 14647 and 15151.
  • part of the 3-aliquot tree. The aliquot sequence starting at 288 is: 288, 531,249, 87, 33, 15, 9, 4, 3, 1, 0.

References

[edit]
  1. ^"Sloane's A016105 : Blum integers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-05-28.
0 to 199
200 to 399
400 to 999
1000s and 10,000s
1000s
10,000s
100,000s to 10,000,000,000,000s


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