12747747 has 4 divisors (see below), whose sum is σ = 16997000. Its totient is φ = 8498496.

The previous prime is 12747703. The next prime is 12747751. The reversal of 12747747 is 74774721.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12747747 - 2⁷ = 12747619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12747767) 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 3 ways as a sum of consecutive naturals, for example, 2124622 + ... + 2124627.

It is an arithmetic number, because the mean of its divisors is an integer number (4249250).

Almost surely, 2^12747747 is an apocalyptic number.

12747747 is a deficient number, since it is larger than the sum of its proper divisors (4249253).

12747747 is an equidigital number, since it uses as much as digits as its factorization.

12747747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4249252.

The product of its digits is 76832, while the sum is 39.

The square root of 12747747 is about 3570.3987172303. The cubic root of 12747747 is about 233.6026751410.

It can be divided in two parts, 127 and 47747, that added together give a palindrome (47874).

The spelling of 12747747 in words is "twelve million, seven hundred forty-seven thousand, seven hundred forty-seven".