12278012 has 24 divisors (see below), whose sum is σ = 22984416. Its totient is φ = 5718528.

The previous prime is 12278011. The next prime is 12278017. The reversal of 12278012 is 21087221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12278011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6128 + ... + 7880.

It is an arithmetic number, because the mean of its divisors is an integer number (957684).

Almost surely, 2^12278012 is an apocalyptic number.

It is an amenable number.

12278012 is a deficient number, since it is larger than the sum of its proper divisors (10706404).

12278012 is a wasteful number, since it uses less digits than its factorization.

12278012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877 (or 1875 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 12278012 is about 3503.9994292237. Note that the first 3 decimals coincide. The cubic root of 12278012 is about 230.6973917811.

The spelling of 12278012 in words is "twelve million, two hundred seventy-eight thousand, twelve".