Thursday, November 7, 2013

4178

4178 = 2 x 2089.

4178 is a number such that its digit sum in base 2 (4) and its digit sum in base 10 (20) are in the ratio of 2:10 (A135110).

4178 is the sum of the first 36 palindromes (A046489).

4178 is a composite number such that exactly eight permutations of its digits give primes (A163560).

4178 has a representation as a sum of two squares: 4178 = 372 + 532.

4178 is a divisor of 3918 - 1.


Source: On-Line Encyclopedia of Integer Sequences

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