12543412 has 18 divisors (see below), whose sum is σ = 25535202. Its totient is φ = 5375664.

The previous prime is 12543397. The next prime is 12543413. The reversal of 12543412 is 21434521.

It can be written as a sum of positive squares in only one way, i.e., 11861136 + 682276 = 3444^2 + 826^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12543413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31803 + ... + 32194.

Almost surely, 2^12543412 is an apocalyptic number.

It is an amenable number.

12543412 is an abundant number, since it is smaller than the sum of its proper divisors (12991790).

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

12543412 is a wasteful number, since it uses less digits than its factorization.

12543412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64015 (or 64006 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 12543412 is about 3541.6679686272. The cubic root of 12543412 is about 232.3477987947.

Adding to 12543412 its reverse (21434521), we get a palindrome (33977933).

The spelling of 12543412 in words is "twelve million, five hundred forty-three thousand, four hundred twelve".