420 = 1 + 2 × 3 + 4 + 56 × 7 + 8 + 9
420 = 9 + 8 × 7 + 6 × 5 + 4 + 321
420 = −0^0 − 1^7 + 2^8 − 3^9 + 4^5 + 5^6 + 6^1 + 7^4 + 8^2 + 9^3
420 divides 29^2 - 1.
420 = \( 8859060149051^3 - 2680209928162^3 - 8776520527687^3 \)
Number of ways to write 31 as an ordered sum of 4 nonprime numbers
The ring of integers of the field Q(sqrt(-420)) has class number 8.
Factors: 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420
Four hundred twenty
Representations, Binary to Hexadecimal:
110100100_2
120120_3
12210_4
3140_5
1540_6
1140_7
644_8
516_9
352_11
2b0_12
264_13
220_14
1d0_15
1a4_16
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