



Number 85

eighty five

Properties of the number 85

Factorization 

5 * 17

Divisors 
1, 5, 17, 85

Count of divisors 
4

Sum of divisors 
108

Previous integer 
84 
Next integer 
86 
Is prime? 
NO

Previous prime 
83

Next prime 
89

85th prime 
439

Is a Fibonacci number? 
NO

Is a Bell number? 
NO

Is a Catalan number? 
NO

Is a factorial? 
NO

Is a regular number? 
NO

Is a perfect number? 
NO

Polygonal number (s < 11)? 
decagonal(5) 
Binary 
1010101 
Octal 
125 
Duodecimal 
71 
Hexadecimal 
55 
Square 
7225 
Square root 
9.2195444572929 
Natural logarithm 
4.4426512564903 
Decimal logarithm 
1.9294189257143 
Sine 
0.17607561994859 
Cosine 
0.98437664339404 
Tangent 
0.17887017243877 

Number 85 is pronounced eighty five.
Number 85 is a composite number.
Factors of 85 are 5 * 17.
Number 85 has 4 divisors: 1, 5, 17, 85.
Sum of the divisors is 108.
Number 85 is not a Fibonacci number.
It is not a Bell number.
Number 85 is not a Catalan number.
Number 85 is not a regular number (Hamming number).
It is a not factorial of any number.
Number 85 is a deficient number and therefore is not a perfect number.
Number 85 is a decagonal number with n=5.
Binary numeral for number 85 is 1010101.
Octal numeral is 125.
Duodecimal value is 71.
Hexadecimal representation is 55.
Square of the number 85 is 7225.
Square root of the number 85 is 9.2195444572929.
Natural logarithm of 85 is 4.4426512564903
Decimal logarithm of the number 85 is 1.9294189257143
Sine of 85 is 0.17607561994859. Cosine of the number 85 is 0.98437664339404. Tangent of the number 85 is 0.17887017243877



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