12543612 has 24 divisors (see below), whose sum is σ = 29353296. Its totient is φ = 4169088.

The previous prime is 12543607. The next prime is 12543647. The reversal of 12543612 is 21634521.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3448 + ... + 6080.

It is an arithmetic number, because the mean of its divisors is an integer number (1223054).

Almost surely, 2^12543612 is an apocalyptic number.

12543612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12543612 is an abundant number, since it is smaller than the sum of its proper divisors (16809684).

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

12543612 is a wasteful number, since it uses less digits than its factorization.

12543612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037 (or 3035 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 12543612 is about 3541.6962037984. The cubic root of 12543612 is about 232.3490336877.

Subtracting 12543612 from its reverse (21634521), we obtain a palindrome (9090909).

The spelling of 12543612 in words is "twelve million, five hundred forty-three thousand, six hundred twelve".