12744020 has 12 divisors (see below), whose sum is σ = 26762484. Its totient is φ = 5097600.

The previous prime is 12744019. The next prime is 12744049. The reversal of 12744020 is 2044721.

It can be written as a sum of positive squares in 2 ways, for example, as 3034564 + 9709456 = 1742^2 + 3116^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 637201 = 12744020 / (1 + 2 + 7 + 4 + 4 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 12743983 and 12744001.

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, 318581 + ... + 318620.

It is an arithmetic number, because the mean of its divisors is an integer number (2230207).

Almost surely, 2^12744020 is an apocalyptic number.

12744020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12744020 is an abundant number, since it is smaller than the sum of its proper divisors (14018464).

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

12744020 is a wasteful number, since it uses less digits than its factorization.

12744020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637210 (or 637208 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 12744020 is about 3569.8767485727. The cubic root of 12744020 is about 233.5799071431.

Adding to 12744020 its reverse (2044721), we get a palindrome (14788741).

The spelling of 12744020 in words is "twelve million, seven hundred forty-four thousand, twenty".