102 (number)

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Natural number

← 101 102 103 →
← 100 101 102 103 104 105 106 107 108 109 → List of numbers Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	one hundred two
Ordinal	102nd (one hundred second)
Factorization	2 ×ばつ 3 ×ばつ 17
Divisors	1, 2, 3, 6, 17, 34, 51, 102
Greek numeral	ΡΒ ́
Roman numeral	CII, cii
Binary	1100110₂
Ternary	10210₃
Senary	250₆
Octal	146₈
Duodecimal	86₁₂
Hexadecimal	66₁₆

102 (one hundred [and] two) is the natural number following 101 and preceding 103.

In mathematics

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102 is an abundant number and a semiperfect number. It is a sphenic number.

The sum of Euler's totient function φ(x) over the first eighteen integers is 102.

102 is the first three-digit base 10 polydivisible number, since 1 is divisible by 1, 10 is divisible by 2 and 102 is divisible by 3. This also shows that 102 is a Harshad number. 102 is the first 3-digit number divisible by the numbers 3, 6, 17, 34 and 51.

102⁶⁴ + 1 is a prime number.

There are 102 vertices in the Biggs–Smith graph.

In other fields

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102 is also:

The emergency telephone number for police in Azerbaijan, Mongolia, Ukraine and Belarus
The emergency telephone number for fire in Israel
The emergency telephone number for ambulance in parts of India
The emergency telephone number for ambulance in Maldives

References

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Wells, D. The Penguin Dictionary of Curious and Interesting Numbers London: Penguin Group. (1987): 133

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\mathbb {Z}

{\displaystyle \mathbb {Z} } Integers

−2 , −1

0 to 199

0 to 99

100 to 199

0
1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18
19

20
21
22
23
24
25
26
27
28
29

30
31
32
33
34
35
36
37
38
39

40
41
42
43
44
45
46
47
48
49

50
51
52
53
54
55
56
57
58
59

60
61
62
63
64
65
66
67
68
69

70
71
72
73
74
75
76
77
78
79

80
81
82
83
84
85
86
87
88
89

90
91
92
93
94
95
96
97
98
99

200 to 399

200 to 299

300 to 399

400 to 999

400s, 500s, and 600s	700s, 800s, and 900s
400 420 440 495 496 500 501 511 512 555 600 610 613 616 666 693	700 720 743 744 777 786 800 801 836 840 880 881 888 900 911 971 987 999

1000s and 10,000s
1000s	1000 1001 1023 1024 1089 1093 1105 1234 1289 1458 1510 1728 1729 1980 1987 2000 2520 3000 3511 4000 5000 5040 6000 6174 7000 7744 7825 8000 8128 8192 9000 9855 9999
10,000s	10,000 16,807 20,000 30,000 40,000 50,000 60,000 64,079 65,535 65,536 65,537 70,000 80,000 90,000

100,000s to 10,000,000,000,000s
100,000 142,857 144,000 1,000,000 10,000,000 43,112,609 100,000,000 1,000,000,000 2,147,483,647 4,294,967,295 10,000,000,000 100,000,000,000 1,000,000,000,000 10,000,000,000,000

Large numbers

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