12781008 has 120 divisors (see below), whose sum is σ = 39693888. Its totient is φ = 3818496.

The previous prime is 12781007. The next prime is 12781009. The reversal of 12781008 is 80018721.

It is an interprime number because it is at equal distance from previous prime (12781007) and next prime (12781009).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12781007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56191 + ... + 56417.

Almost surely, 2^12781008 is an apocalyptic number.

12781008 is a gapful number since it is divisible by the number (18) 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 12781008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19846944).

12781008 is an abundant number, since it is smaller than the sum of its proper divisors (26912880).

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

12781008 is a wasteful number, since it uses less digits than its factorization.

12781008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 12781008 is about 3575.0535660323. The cubic root of 12781008 is about 233.8056681545.

Adding to 12781008 its reverse (80018721), we get a palindrome (92799729).

The spelling of 12781008 in words is "twelve million, seven hundred eighty-one thousand, eight".