147

Number
$147$ (one hundred and forty-seven) is:


 * $3 \times 7^2$


 * The $3$rd term of the $3$rd $5$-tuple of consecutive integers have the property that they are not values of the $\sigma$ function $\map \sigma n$ for any $n$:
 * $\tuple {145, 146, 147, 148, 149}$


 * The number of different representations of $1$ as the sum of $5$ unit fractions.


 * The $1$st of the $5$th pair of consecutive integers which both have $6$ divisors:
 * $\map \tau {147} = \map \tau {148} = 6$


 * The $28$th positive integer $n$ such that no factorial of an integer can end with $n$ zeroes.


 * The $60$th positive integer after $2$, $3$, $4$, $7$, $8$, $\ldots$, $95$, $96$, $100$, $101$, $102$, $107$, $112$, $116$, $124$, $136$, $137$, $141$, $142$ which cannot be expressed as the sum of distinct pentagonal numbers.


 * $42 \times 147 = 6174$ which is Kaprekar's Constant