12881218 has 12 divisors (see below), whose sum is σ = 22476582. Its totient is φ = 5520480.

The previous prime is 12881207. The next prime is 12881251. The reversal of 12881218 is 81218821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12299049 + 582169 = 3507^2 + 763^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12881218.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65623 + ... + 65818.

Almost surely, 2^12881218 is an apocalyptic number.

12881218 is a deficient number, since it is larger than the sum of its proper divisors (9595364).

12881218 is a wasteful number, since it uses less digits than its factorization.

12881218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131457 (or 131450 counting only the distinct ones).

The product of its digits is 2048, while the sum is 31.

The square root of 12881218 is about 3589.0413761895. The cubic root of 12881218 is about 234.4151322803.

The spelling of 12881218 in words is "twelve million, eight hundred eighty-one thousand, two hundred eighteen".