1645 = 1 + 2 × 3 × 45 × 6 + 7 + 8 + 9
1645 = (9 + 8 + 7) × 65 + 43 + 21
1645 = 0^7 + 1^9 + 2^6 − 3^8 + 4^5 + 5^0 + 6^2 + 7^1 + 8^3 + 9^4
1645 divides 48^4 - 1.
Number of distinct products i*j*k for 1 <= i <= j < k <= n, n = 29
Sphenic number: Product of 3 distinct Primes, (List)
Factors: 1, 5, 7, 35, 47, 235, 329, 1645
One thousand, six hundred forty-five
Representations, Binary to Hexadecimal:
11001101101_2
2020221_3
121231_4
23040_5
11341_6
4540_7
3155_8
2227_9
1266_11
b51_12
997_13
857_14
74a_15
66d_16
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Undergraduate Texts in Mathematics
Graduate Studies in Mathematics
