12781608 has 32 divisors (see below), whose sum is σ = 36519360. Its totient is φ = 3651840.

The previous prime is 12781607. The next prime is 12781609. The reversal of 12781608 is 80618721.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12781607) and next prime (12781609).

It is not an unprimeable number, because it can be changed into a prime (12781607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37873 + ... + 38208.

It is an arithmetic number, because the mean of its divisors is an integer number (1141230).

Almost surely, 2^12781608 is an apocalyptic number.

It is an amenable number.

12781608 is an abundant number, since it is smaller than the sum of its proper divisors (23737752).

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

12781608 is a wasteful number, since it uses less digits than its factorization.

12781608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76097 (or 76093 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 12781608 is about 3575.1374798740. The cubic root of 12781608 is about 233.8093267393.

The spelling of 12781608 in words is "twelve million, seven hundred eighty-one thousand, six hundred eight".