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Number 1491

Prime factorization

Factorization 3 * 7 * 71
Divisors 1, 3, 7, 21, 71, 213, 497, 1491
Count of divisors 8
Sum of divisors 2304

Basic properties

Is prime? × NO
Previous integer 1490
Next integer 1492
Previous prime number 1489
Next prime number 1493
Reciprocal 0.000670690811535
Square 2223081
Square root 38.61346915261564
Natural logarithm 7.307202314764737
Decimal logarithm 3.1734776434529945
Sine 0.9510173851795533
Cosine -0.30913740162951053
Tangent -3.0763582153650617

Expressions

Binary 10111010011
Octal 2723
Hexadecimal 5d3