12744939 has 8 divisors (see below), whose sum is σ = 17095680. Its totient is φ = 8445416.

The previous prime is 12744929. The next prime is 12744947. The reversal of 12744939 is 93944721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12744939 - 2¹³ = 12736747 is a prime.

It is a super-2 number, since 2×12744939² = 324866940227442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12744897 and 12744906.

It is not an unprimeable number, because it can be changed into a prime (12744929) 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 7 ways as a sum of consecutive naturals, for example, 12219 + ... + 13220.

It is an arithmetic number, because the mean of its divisors is an integer number (2136960).

Almost surely, 2^12744939 is an apocalyptic number.

12744939 is a deficient number, since it is larger than the sum of its proper divisors (4350741).

12744939 is a wasteful number, since it uses less digits than its factorization.

12744939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25609.

The product of its digits is 54432, while the sum is 39.

The square root of 12744939 is about 3570.0054621807. The cubic root of 12744939 is about 233.5855216659.

Subtracting from 12744939 its sum of digits (39), we obtain a square (12744900 = 3570²).

The spelling of 12744939 in words is "twelve million, seven hundred forty-four thousand, nine hundred thirty-nine".