102 (number)

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

← 101 103 → 102
← 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)
Numeral system	102
Factorization	$2 \cdot 3 \cdot 17$
Divisors	1, 2, 3, 6, 17, 34, 51, 102
Roman numeral	CII
Binary	11001102
Octal	1468
Duodecimal	8612
Hexadecimal	6616

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.

In science

• The atomic number of nobelium, an actinide.

In other fields

102 is also:

• The emergency telephone number for police in Ukraine and Belarus
• The emergency telephone number for fire in Israel
• The emergency telephone number for ambulance in parts of India
• The Empire State Building in New York City has 102 floors

See also

• List of highways numbered 102

References

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