12971517 has 16 divisors (see below), whose sum is σ = 19436928. Its totient is φ = 7634880.

The previous prime is 12971513. The next prime is 12971521. The reversal of 12971517 is 71517921.

It is an interprime number because it is at equal distance from previous prime (12971513) and next prime (12971521).

It is not a de Polignac number, because 12971517 - 2² = 12971513 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12971513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6334 + ... + 8127.

It is an arithmetic number, because the mean of its divisors is an integer number (1214808).

Almost surely, 2^12971517 is an apocalyptic number.

It is an amenable number.

12971517 is a deficient number, since it is larger than the sum of its proper divisors (6465411).

12971517 is a wasteful number, since it uses less digits than its factorization.

12971517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14500.

The product of its digits is 4410, while the sum is 33.

The square root of 12971517 is about 3601.5992281208. The cubic root of 12971517 is about 234.9616173921.

The spelling of 12971517 in words is "twelve million, nine hundred seventy-one thousand, five hundred seventeen".