12543136 has 24 divisors (see below), whose sum is σ = 24773364. Its totient is φ = 6251520.

The previous prime is 12543131. The next prime is 12543151. The reversal of 12543136 is 63134521.

12543136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11971600 + 571536 = 3460^2 + 756^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12543136.

It is not an unprimeable number, because it can be changed into a prime (12543131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18646 + ... + 19306.

Almost surely, 2^12543136 is an apocalyptic number.

12543136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12543136 is a deficient number, since it is larger than the sum of its proper divisors (12230228).

12543136 is an equidigital number, since it uses as much as digits as its factorization.

12543136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264 (or 1256 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 12543136 is about 3541.6290037213. The cubic root of 12543136 is about 232.3460946209.

Adding to 12543136 its reverse (63134521), we get a palindrome (75677657).

The spelling of 12543136 in words is "twelve million, five hundred forty-three thousand, one hundred thirty-six".