12712745 has 4 divisors (see below), whose sum is σ = 15255300. Its totient is φ = 10170192.

The previous prime is 12712741. The next prime is 12712751. The reversal of 12712745 is 54721721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9709456 + 3003289 = 3116^2 + 1733^2 .

It is a cyclic number.

It is not a de Polignac number, because 12712745 - 2² = 12712741 is a prime.

It is a super-2 number, since 2×12712745² = 323227770870050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12712741) 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 3 ways as a sum of consecutive naturals, for example, 1271270 + ... + 1271279.

It is an arithmetic number, because the mean of its divisors is an integer number (3813825).

Almost surely, 2^12712745 is an apocalyptic number.

It is an amenable number.

12712745 is a deficient number, since it is larger than the sum of its proper divisors (2542555).

12712745 is an equidigital number, since it uses as much as digits as its factorization.

12712745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2542554.

The product of its digits is 3920, while the sum is 29.

The square root of 12712745 is about 3565.4936544608. The cubic root of 12712745 is about 233.3886750817.

The spelling of 12712745 in words is "twelve million, seven hundred twelve thousand, seven hundred forty-five".