Properties of numbers / Online calculators / Number sequence database

Number 6561

Prime factorization

Factorization	3 * 3 * 3 * 3 * 3 * 3 * 3 * 3
Divisors	1, 3, 9, 27, 81, 243, 729, 2187, 6561
Count of divisors	9
Sum of divisors	9841

Basic properties

Is prime?	× NO
Previous integer	6560
Next integer	6562
Previous prime number	6553
Next prime number	6569
Reciprocal	0.000152415790275
Square	43046721
Square root	81
Natural logarithm	8.788898309344878
Decimal logarithm	3.8169700377573
Sine	0.9767074399435045
Cosine	0.2145753405193745
Tangent	4.551815868400383

Expressions

Binary	1100110100001
Octal	14641
Hexadecimal	19a1