12543456 has 48 divisors (see below), whose sum is σ = 33146064. Its totient is φ = 4153344.

The previous prime is 12543449. The next prime is 12543463. The reversal of 12543456 is 65434521.

It is an interprime number because it is at equal distance from previous prime (12543449) and next prime (12543463).

It is a tau number, because it is divible by the number of its divisors (48).

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, 18190 + ... + 18866.

It is an arithmetic number, because the mean of its divisors is an integer number (690543).

Almost surely, 2^12543456 is an apocalyptic number.

12543456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12543456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16573032).

12543456 is an abundant number, since it is smaller than the sum of its proper divisors (20602608).

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

12543456 is a wasteful number, since it uses less digits than its factorization.

12543456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883 (or 875 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 12543456 is about 3541.6741803842. The cubic root of 12543456 is about 232.3480704723.

Adding to 12543456 its reverse (65434521), we get a palindrome (77977977).

The spelling of 12543456 in words is "twelve million, five hundred forty-three thousand, four hundred fifty-six".