12123472 has 20 divisors (see below), whose sum is σ = 23548096. Its totient is φ = 6046560.

The previous prime is 12123467. The next prime is 12123481. The reversal of 12123472 is 27432121.

It is an alternating number because its digits alternate between odd and even.

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, 8473 + ... + 9799.

Almost surely, 2^12123472 is an apocalyptic number.

It is an amenable number.

12123472 is a deficient number, since it is larger than the sum of its proper divisors (11424624).

12123472 is a wasteful number, since it uses less digits than its factorization.

12123472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906 (or 1900 counting only the distinct ones).

The product of its digits is 672, while the sum is 22.

The square root of 12123472 is about 3481.8776543698. The cubic root of 12123472 is about 229.7253937541.

Adding to 12123472 its reverse (27432121), we get a palindrome (39555593).

The spelling of 12123472 in words is "twelve million, one hundred twenty-three thousand, four hundred seventy-two".