102 (number)

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

← 100 101 102 103 104 105 106 107 108 109 → List of numbers — Integers ← 100 110 120 130 140 150 160 170 180 190 →
Cardinal	one hundred [and] two
Ordinal	102nd (one hundred [and] second)
Factorization	$2 \cdot 3 \cdot 17$
Divisors	2, 3, 6, 17, 34, 51.
Roman numeral	CII
Binary	1100110
Hexadecimal	66

1 In mathematics
2 In science
3 In other fields
4 Reference

[edit] In mathematics

102 is an abundant number and semiperfect number. It is a sphenic number. It is the sum of four consecutive prime numbers (19 + 23 + 29 + 31).

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

102 is the third 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.

[edit] In science

The atomic number of nobelium, an actinide.

In astronomy,

Messier object M102, possibly the Spindle Galaxy, a magnitude 10.5 spiral galaxy in the constellation Draco

The New General Catalogue object NGC102, a galaxy in the constellation Cetus

Asteroid 102 Miriam

The Saros number of the solar eclipse series which began on 376 May 5 and ended on 1638 June 12. The duration of Saros series 102 was 1262.1 years, and it contained 71 solar eclipses.

The Saros number of the lunar eclipse series which began on 461 October 5 and ended on 1958 April 4. The duration of Saros series 102 was 1496.5 years, and it contained 84 lunar eclipses.

[edit] In other fields

102 is also:

The emergency telephone number for fire in Israel
In the title of the movie 102 Dalmatians, starring Glenn Close.
The number of the space shuttle mission STS-102.
The year AD 102 or 102 BC.
A London bus running from Edmonton to Golders Green calling at Bounds Green and Muswell Hill
The Orbiter Vehicle Designation for Shuttle Columbia