Adding to 312505 its reverse (505213), we get a palindrome (817718).
It is a semiprime because it is the product of two primes.
It is a de Polignac number, because none of the positive numbers 2k-312505 is a prime.
It is a Duffinian number.
It is a congruent number.
312505 is a Friedman number, since it can be written as 5*(50^3/2+1), using all its digits and the basic arithmetic operations.
2312505 is an apocalyptic number.
It is an amenable number.
312505 is an equidigital number, since it uses as much as digits as its factorization.
312505 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 62506.
The square root of 312505 is about 559.0214664930. The cubic root of 312505 is about 67.8608023353.
The spelling of 312505 in words is "three hundred twelve thousand, five hundred five".