648012 has 12 divisors (see below), whose sum is σ = 1512056. Its totient is φ = 216000.

The previous prime is 648007. The next prime is 648019. The reversal of 648012 is 210846.

648012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 648012.

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 648012.

It is not an unprimeable number, because it can be changed into a prime (648019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26989 + ... + 27012.

2⁶⁴⁸⁰¹² is an apocalyptic number.

It is an amenable number.

648012 is an abundant number, since it is smaller than the sum of its proper divisors (864044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648012 is a wasteful number, since it uses less digits than its factorization.

648012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54008 (or 54006 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 648012 is about 804.9919254253. The cubic root of 648012 is about 86.5355083817.

Adding to 648012 its reverse (210846), we get a palindrome (858858).

The spelling of 648012 in words is "six hundred forty-eight thousand, twelve".