85

Math

is the integer between.

Math features

 * is an odd number.
 * 85 is a composite number and a deficient number.
 * 85 is a palindromic number in bases 2, 4, 7, 16 and 84.
 * An 85-gon is a constructible polygon, as 85 is a product of Fermat primes: \(85 = (2^{2^1}+1)(2^{2^2}+1)\).
 * 85 is a semiprime.

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 * $1⁄2$ is half of