12438981 has 16 divisors (see below), whose sum is σ = 18683520. Its totient is φ = 8177760.

The previous prime is 12438947. The next prime is 12438983. The reversal of 12438981 is 18983421.

It is not a de Polignac number, because 12438981 - 2¹⁵ = 12406213 is a prime.

It is a super-2 number, since 2×12438981² = 309456496636722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12438983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1185 + ... + 5126.

It is an arithmetic number, because the mean of its divisors is an integer number (1167720).

Almost surely, 2^12438981 is an apocalyptic number.

It is an amenable number.

12438981 is a deficient number, since it is larger than the sum of its proper divisors (6244539).

12438981 is an equidigital number, since it uses as much as digits as its factorization.

12438981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6393 (or 6387 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 12438981 is about 3526.8939592792. The cubic root of 12438981 is about 231.7011920549.

The spelling of 12438981 in words is "twelve million, four hundred thirty-eight thousand, nine hundred eighty-one".