249 (number)

Updated on Dec 03, 2023

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249 250 → Factorization 3 × 83 Binary 111110012		Cardinal two hundred forty-nine Roman numeral CCXLIX
Ordinal 249th (two hundred and forty-ninth)

249 (two hundred [and] forty-nine) is the natural number following 248 and preceding 250.

In mathematics

249 is:

a Blum integer.

a semiprime.

palindromic in bases 82 (33₈₂) and 248 (11₂₄₈).

a Harshad 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.

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