13121344 has 28 divisors (see below), whose sum is σ = 26472388. Its totient is φ = 6451200.

The previous prime is 13121341. The next prime is 13121371. The reversal of 13121344 is 44312131.

It can be written as a sum of positive squares in 2 ways, for example, as 4359744 + 8761600 = 2088^2 + 2960^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2224 + ... + 5584.

Almost surely, 2^13121344 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 13121344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13236194).

13121344 is an abundant number, since it is smaller than the sum of its proper divisors (13351044).

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

13121344 is an equidigital number, since it uses as much as digits as its factorization.

13121344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434 (or 3424 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 13121344 is about 3622.3395754678. The cubic root of 13121344 is about 235.8627949004.

Adding to 13121344 its reverse (44312131), we get a palindrome (57433475).

The spelling of 13121344 in words is "thirteen million, one hundred twenty-one thousand, three hundred forty-four".