12981416 has 32 divisors (see below), whose sum is σ = 28296000. Its totient is φ = 5467776.

The previous prime is 12981403. The next prime is 12981431. The reversal of 12981416 is 61418921.

It is a super-2 number, since 2×12981416² = 337034322730112, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1340 + ... + 5268.

It is an arithmetic number, because the mean of its divisors is an integer number (884250).

Almost surely, 2^12981416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12981416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14148000).

12981416 is an abundant number, since it is smaller than the sum of its proper divisors (15314584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12981416 is a wasteful number, since it uses less digits than its factorization.

12981416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001 (or 3997 counting only the distinct ones).

The product of its digits is 3456, while the sum is 32.

The square root of 12981416 is about 3602.9732166643. The cubic root of 12981416 is about 235.0213712268.

The spelling of 12981416 in words is "twelve million, nine hundred eighty-one thousand, four hundred sixteen".