12720443 has 8 divisors (see below), whose sum is σ = 13424400. Its totient is φ = 12019968.

The previous prime is 12720439. The next prime is 12720457. The reversal of 12720443 is 34402721.

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 12720443 - 2² = 12720439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12723443) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10703 + ... + 11831.

It is an arithmetic number, because the mean of its divisors is an integer number (1678050).

Almost surely, 2^12720443 is an apocalyptic number.

12720443 is a deficient number, since it is larger than the sum of its proper divisors (703957).

12720443 is a wasteful number, since it uses less digits than its factorization.

12720443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 12720443 is about 3566.5730050007. The cubic root of 12720443 is about 233.4357738397.

The spelling of 12720443 in words is "twelve million, seven hundred twenty thousand, four hundred forty-three".