12712517 has 4 divisors (see below), whose sum is σ = 12720300. Its totient is φ = 12704736.

The previous prime is 12712507. The next prime is 12712519. The reversal of 12712517 is 71521721.

12712517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 71521721 = 6073 ⋅11777.

It can be written as a sum of positive squares in 2 ways, for example, as 2669956 + 10042561 = 1634^2 + 3169^2 .

It is a cyclic number.

It is not a de Polignac number, because 12712517 - 2¹⁴ = 12696133 is a prime.

It is a super-3 number, since 3×12712517³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12712519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392 + ... + 5057.

It is an arithmetic number, because the mean of its divisors is an integer number (3180075).

Almost surely, 2^12712517 is an apocalyptic number.

It is an amenable number.

12712517 is a deficient number, since it is larger than the sum of its proper divisors (7783).

12712517 is an equidigital number, since it uses as much as digits as its factorization.

12712517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7782.

The product of its digits is 980, while the sum is 26.

The square root of 12712517 is about 3565.4616811852. The cubic root of 12712517 is about 233.3872798169.

The spelling of 12712517 in words is "twelve million, seven hundred twelve thousand, five hundred seventeen".