12989081 has 16 divisors (see below), whose sum is σ = 15289344. Its totient is φ = 10805184.

The previous prime is 12989077. The next prime is 12989083. The reversal of 12989081 is 18098921.

It is a cyclic number.

It is not a de Polignac number, because 12989081 - 2² = 12989077 is a prime.

It is a super-2 number, since 2×12989081² = 337432450449122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12989083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58136 + ... + 58358.

It is an arithmetic number, because the mean of its divisors is an integer number (955584).

Almost surely, 2^12989081 is an apocalyptic number.

It is an amenable number.

12989081 is a deficient number, since it is larger than the sum of its proper divisors (2300263).

12989081 is a wasteful number, since it uses less digits than its factorization.

12989081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440.

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 12989081 is about 3604.0367645184. The cubic root of 12989081 is about 235.0676189902.

The spelling of 12989081 in words is "twelve million, nine hundred eighty-nine thousand, eighty-one".