12647497 has 4 divisors (see below), whose sum is σ = 12677140. Its totient is φ = 12617856.

The previous prime is 12647491. The next prime is 12647513. The reversal of 12647497 is 79474621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79474621 = 43 ⋅1848247.

It can be written as a sum of positive squares in 2 ways, for example, as 3136441 + 9511056 = 1771^2 + 3084^2 .

It is a cyclic number.

It is not a de Polignac number, because 12647497 - 2³ = 12647489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12647491) 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, 14172 + ... + 15037.

It is an arithmetic number, because the mean of its divisors is an integer number (3169285).

Almost surely, 2^12647497 is an apocalyptic number.

It is an amenable number.

12647497 is a deficient number, since it is larger than the sum of its proper divisors (29643).

12647497 is an equidigital number, since it uses as much as digits as its factorization.

12647497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29642.

The product of its digits is 84672, while the sum is 40.

The square root of 12647497 is about 3556.3319586338. The cubic root of 12647497 is about 232.9887018904.

The spelling of 12647497 in words is "twelve million, six hundred forty-seven thousand, four hundred ninety-seven".