12531456 has 216 divisors, whose sum is σ = 44273040. Its totient is φ = 3483648.

The previous prime is 12531443. The next prime is 12531461. The reversal of 12531456 is 65413521.

12531456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (216).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 338670 + ... + 338706.

Almost surely, 2^12531456 is an apocalyptic number.

12531456 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 12531456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22136520).

12531456 is an abundant number, since it is smaller than the sum of its proper divisors (31741584).

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

12531456 is an equidigital number, since it uses as much as digits as its factorization.

12531456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 49 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 12531456 is about 3539.9796609585. The cubic root of 12531456 is about 232.2739530349.

Adding to 12531456 its reverse (65413521), we get a palindrome (77944977).

The spelling of 12531456 in words is "twelve million, five hundred thirty-one thousand, four hundred fifty-six".