12539717 has 4 divisors (see below), whose sum is σ = 12944256. Its totient is φ = 12135180.

The previous prime is 12539711. The next prime is 12539729. The reversal of 12539717 is 71793521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12539717 - 2⁴ = 12539701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12539711) 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, 202223 + ... + 202284.

It is an arithmetic number, because the mean of its divisors is an integer number (3236064).

Almost surely, 2^12539717 is an apocalyptic number.

It is an amenable number.

12539717 is a deficient number, since it is larger than the sum of its proper divisors (404539).

12539717 is an equidigital number, since it uses as much as digits as its factorization.

12539717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404538.

The product of its digits is 13230, while the sum is 35.

The square root of 12539717 is about 3541.1462833382. The cubic root of 12539717 is about 232.3249817858.

The spelling of 12539717 in words is "twelve million, five hundred thirty-nine thousand, seven hundred seventeen".