12543912 has 24 divisors (see below), whose sum is σ = 33973290. Its totient is φ = 4181280.

The previous prime is 12543911. The next prime is 12543919. The reversal of 12543912 is 21934521.

It can be written as a sum of positive squares in only one way, i.e., 12489156 + 54756 = 3534^2 + 234^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (12543911) 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, 87039 + ... + 87182.

Almost surely, 2^12543912 is an apocalyptic number.

12543912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12543912 is an abundant number, since it is smaller than the sum of its proper divisors (21429378).

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

12543912 is a wasteful number, since it uses less digits than its factorization.

12543912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174233 (or 174226 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 12543912 is about 3541.7385561331. The cubic root of 12543912 is about 232.3508860025.

The spelling of 12543912 in words is "twelve million, five hundred forty-three thousand, nine hundred twelve".