12881312 has 12 divisors (see below), whose sum is σ = 25360146. Its totient is φ = 6440640.

The previous prime is 12881299. The next prime is 12881329. The reversal of 12881312 is 21318821.

It can be written as a sum of positive squares in only one way, i.e., 9024016 + 3857296 = 3004^2 + 1964^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201239 + ... + 201302.

Almost surely, 2^12881312 is an apocalyptic number.

It is an amenable number.

12881312 is a deficient number, since it is larger than the sum of its proper divisors (12478834).

12881312 is an equidigital number, since it uses as much as digits as its factorization.

12881312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402551 (or 402543 counting only the distinct ones).

The product of its digits is 768, while the sum is 26.

The square root of 12881312 is about 3589.0544715844. The cubic root of 12881312 is about 234.4157024896.

The spelling of 12881312 in words is "twelve million, eight hundred eighty-one thousand, three hundred twelve".