12978881 has 8 divisors (see below), whose sum is σ = 13709280. Its totient is φ = 12253248.

The previous prime is 12978859. The next prime is 12978883. The reversal of 12978881 is 18887921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12978881 - 2⁶ = 12978817 is a prime.

It is a super-2 number, since 2×12978881² = 336902704024322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12978883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5390 + ... + 7416.

It is an arithmetic number, because the mean of its divisors is an integer number (1713660).

Almost surely, 2^12978881 is an apocalyptic number.

It is an amenable number.

12978881 is a deficient number, since it is larger than the sum of its proper divisors (730399).

12978881 is a wasteful number, since it uses less digits than its factorization.

12978881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383.

The product of its digits is 64512, while the sum is 44.

The square root of 12978881 is about 3602.6214066982. The cubic root of 12978881 is about 235.0060719723.

The spelling of 12978881 in words is "twelve million, nine hundred seventy-eight thousand, eight hundred eighty-one".