12811456 has 28 divisors (see below), whose sum is σ = 29055568. Its totient is φ = 5490432.

The previous prime is 12811423. The next prime is 12811457. The reversal of 12811456 is 65411821.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (12811457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13851 + ... + 14746.

Almost surely, 2^12811456 is an apocalyptic number.

12811456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12811456 is an abundant number, since it is smaller than the sum of its proper divisors (16244112).

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

12811456 is an equidigital number, since it uses as much as digits as its factorization.

12811456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28616 (or 28606 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The square root of 12811456 is about 3579.3094306025. The cubic root of 12811456 is about 233.9911848044.

The spelling of 12811456 in words is "twelve million, eight hundred eleven thousand, four hundred fifty-six".