12981744 has 60 divisors (see below), whose sum is σ = 38475216. Its totient is φ = 4071936.

The previous prime is 12981737. The next prime is 12981751. The reversal of 12981744 is 44718921.

It is an interprime number because it is at equal distance from previous prime (12981737) and next prime (12981751).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12981699 and 12981708.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 204 + ... + 5099.

Almost surely, 2^12981744 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 12981744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19237608).

12981744 is an abundant number, since it is smaller than the sum of its proper divisors (25493472).

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

12981744 is a wasteful number, since it uses less digits than its factorization.

12981744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5334 (or 5325 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 12981744 is about 3603.0187343393. The cubic root of 12981744 is about 235.0233506298.

The spelling of 12981744 in words is "twelve million, nine hundred eighty-one thousand, seven hundred forty-four".