12278872 has 16 divisors (see below), whose sum is σ = 24024240. Its totient is φ = 5872416.

The previous prime is 12278869. The next prime is 12278887. The reversal of 12278872 is 27887221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33183 + ... + 33550.

It is an arithmetic number, because the mean of its divisors is an integer number (1501515).

Almost surely, 2^12278872 is an apocalyptic number.

It is an amenable number.

12278872 is a deficient number, since it is larger than the sum of its proper divisors (11745368).

12278872 is a wasteful number, since it uses less digits than its factorization.

12278872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66762 (or 66758 counting only the distinct ones).

The product of its digits is 25088, while the sum is 37.

The square root of 12278872 is about 3504.1221439898. The cubic root of 12278872 is about 230.7027779714.

The spelling of 12278872 in words is "twelve million, two hundred seventy-eight thousand, eight hundred seventy-two".