12756747 has 8 divisors (see below), whose sum is σ = 17288080. Its totient is φ = 8364960.

The previous prime is 12756739. The next prime is 12756763. The reversal of 12756747 is 74765721.

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

It is not a de Polignac number, because 12756747 - 2³ = 12756739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12756707) 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, 34672 + ... + 35037.

It is an arithmetic number, because the mean of its divisors is an integer number (2161010).

Almost surely, 2^12756747 is an apocalyptic number.

12756747 is a deficient number, since it is larger than the sum of its proper divisors (4531333).

12756747 is an equidigital number, since it uses as much as digits as its factorization.

12756747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69773.

The product of its digits is 82320, while the sum is 39.

The square root of 12756747 is about 3571.6588582898. The cubic root of 12756747 is about 233.6576372582.

The spelling of 12756747 in words is "twelve million, seven hundred fifty-six thousand, seven hundred forty-seven".