13121144 has 16 divisors (see below), whose sum is σ = 26049600. Its totient is φ = 6174592.

The previous prime is 13121117. The next prime is 13121159. The reversal of 13121144 is 44112131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 3 ways as a sum of consecutive naturals, for example, 48104 + ... + 48375.

It is an arithmetic number, because the mean of its divisors is an integer number (1628100).

Almost surely, 2^13121144 is an apocalyptic number.

It is an amenable number.

13121144 is a deficient number, since it is larger than the sum of its proper divisors (12928456).

13121144 is a wasteful number, since it uses less digits than its factorization.

13121144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96502 (or 96498 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 13121144 is about 3622.3119688950. The cubic root of 13121144 is about 235.8615965272.

Adding to 13121144 its reverse (44112131), we get a palindrome (57233275).

The spelling of 13121144 in words is "thirteen million, one hundred twenty-one thousand, one hundred forty-four".