12543256 has 16 divisors (see below), whose sum is σ = 25656840. Its totient is φ = 5701440.

The previous prime is 12543241. The next prime is 12543269. The reversal of 12543256 is 65234521.

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, 71181 + ... + 71356.

Almost surely, 2^12543256 is an apocalyptic number.

It is an amenable number.

12543256 is an abundant number, since it is smaller than the sum of its proper divisors (13113584).

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

12543256 is a wasteful number, since it uses less digits than its factorization.

12543256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142554 (or 142550 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 12543256 is about 3541.6459450374. The cubic root of 12543256 is about 232.3468355691.

Adding to 12543256 its reverse (65234521), we get a palindrome (77777777).

The spelling of 12543256 in words is "twelve million, five hundred forty-three thousand, two hundred fifty-six".