1131 = 123 × 4 + 567 + 8 × 9
1131 = 987 + 6 × 5 × 4 + 3 + 21
1131 = 0^5 − 1^8 + 2^6 − 3^9 + 4^7 + 5^1 + 6^3 + 7^2 + 8^4 + 9^0
1131 divides 70^4 - 1.
a(n) = 3*n*(n + 3)/2. (n = 26)
Sum of three consecutive pentagonal numbers
Number that is divisible by the product of its digits.
Number k such that 3^k + 2 is prime
The ring of integers of the field Q(sqrt(-1131)) has class number 8.
Sphenic number: Product of 3 distinct Primes, (List)
Factors: 1, 3, 13, 29, 39, 87, 377, 1131
One thousand, one hundred thirty-one
Representations, Binary to Hexadecimal:
10001101011_2
1112220_3
101223_4
14011_5
5123_6
3204_7
2153_8
1486_9
939_11
7a3_12
690_13
5ab_14
506_15
46b_16<--- --->
Undergraduate Texts in Mathematics
Graduate Studies in Mathematics
