13121444 has 12 divisors (see below), whose sum is σ = 26242944. Its totient is φ = 5623464.

The previous prime is 13121441. The next prime is 13121453. The reversal of 13121444 is 44412131.

13121444 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (13121441) 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 3 ways as a sum of consecutive naturals, for example, 234284 + ... + 234339.

It is an arithmetic number, because the mean of its divisors is an integer number (2186912).

Almost surely, 2^13121444 is an apocalyptic number.

13121444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13121444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13121444 is a wasteful number, since it uses less digits than its factorization.

13121444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468634 (or 468632 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 13121444 is about 3622.3533786753. The cubic root of 13121444 is about 235.8633940824.

Adding to 13121444 its reverse (44412131), we get a palindrome (57533575).

The spelling of 13121444 in words is "thirteen million, one hundred twenty-one thousand, four hundred forty-four".