12744021 has 24 divisors (see below), whose sum is σ = 18234720. Its totient is φ = 7906752.

The previous prime is 12744019. The next prime is 12744049. The reversal of 12744021 is 12044721.

It is a happy number.

12744021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12744021 - 2¹ = 12744019 is a prime.

It is a congruent number.

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

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119050 + ... + 119156.

It is an arithmetic number, because the mean of its divisors is an integer number (759780).

Almost surely, 2^12744021 is an apocalyptic number.

It is an amenable number.

12744021 is a deficient number, since it is larger than the sum of its proper divisors (5490699).

12744021 is a wasteful number, since it uses less digits than its factorization.

12744021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 12744021 is about 3569.8768886336. The cubic root of 12744021 is about 233.5799132526.

Adding to 12744021 its reverse (12044721), we get a palindrome (24788742).

The spelling of 12744021 in words is "twelve million, seven hundred forty-four thousand, twenty-one".