12744121 has 12 divisors (see below), whose sum is σ = 14002428. Its totient is φ = 11591424.

The previous prime is 12744103. The next prime is 12744143. The reversal of 12744121 is 12144721.

It can be written as a sum of positive squares in 6 ways, for example, as 42025 + 12702096 = 205^2 + 3564^2 .

It is not a de Polignac number, because 12744121 - 2⁵ = 12744089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12744092 and 12744101.

It is not an unprimeable number, because it can be changed into a prime (12744821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11821 + ... + 12853.

It is an arithmetic number, because the mean of its divisors is an integer number (1166869).

Almost surely, 2^12744121 is an apocalyptic number.

It is an amenable number.

12744121 is a deficient number, since it is larger than the sum of its proper divisors (1258307).

12744121 is a wasteful number, since it uses less digits than its factorization.

12744121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132 (or 1119 counting only the distinct ones).

The product of its digits is 448, while the sum is 22.

The square root of 12744121 is about 3569.8908946913. The cubic root of 12744121 is about 233.5805242039.

Adding to 12744121 its reverse (12144721), we get a palindrome (24888842).

The spelling of 12744121 in words is "twelve million, seven hundred forty-four thousand, one hundred twenty-one".