1001001

is the integer between.

Math features

 * is an odd number.
 * 1001001 is a composite number and a deficient number.
 * 1001001 is a Harshad number.
 * 1001001 is a palindromic number.

&frac12;

 * $1⁄2$ is half of.
 * 1001001.5 is a happy number if taken to be an integer (but 1001001 is not); see also 10010015.