12123412 has 12 divisors (see below), whose sum is σ = 24246880. Its totient is φ = 5195736.

The previous prime is 12123373. The next prime is 12123439. The reversal of 12123412 is 21432121.

12123412 is an admirable number.

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, 216462 + ... + 216517.

Almost surely, 2^12123412 is an apocalyptic number.

It is an amenable number.

12123412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12123412 is a wasteful number, since it uses less digits than its factorization.

12123412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432990 (or 432988 counting only the distinct ones).

The product of its digits is 96, while the sum is 16.

The square root of 12123412 is about 3481.8690383184. The cubic root of 12123412 is about 229.7250147773.

Adding to 12123412 its reverse (21432121), we get a palindrome (33555533).

It can be divided in two parts, 1212 and 3412, that added together give a square (4624 = 68²).

The spelling of 12123412 in words is "twelve million, one hundred twenty-three thousand, four hundred twelve".