Adding to 312621 its reverse (126213), we get a palindrome (438834).
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 126213 = 3 ⋅42071.
It is a cyclic number.
It is a D-number.
It is a self number, because there is not a number n which added to its sum of digits gives 312621.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312621.
2312621 is an apocalyptic number.
It is an amenable number.
312621 is a wasteful number, since it uses less digits than its factorization.
312621 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 104210.
The square root of 312621 is about 559.1252095908. The cubic root of 312621 is about 67.8691978055.
The spelling of 312621 in words is "three hundred twelve thousand, six hundred twenty-one".