12786317 has 4 divisors (see below), whose sum is σ = 12910560. Its totient is φ = 12662076.

The previous prime is 12786311. The next prime is 12786331. The reversal of 12786317 is 71368721.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71368721 = 101 ⋅706621.

It is a cyclic number.

It is not a de Polignac number, because 12786317 - 2⁶ = 12786253 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 (12786311) 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, 61967 + ... + 62172.

It is an arithmetic number, because the mean of its divisors is an integer number (3227640).

Almost surely, 2^12786317 is an apocalyptic number.

It is an amenable number.

12786317 is a deficient number, since it is larger than the sum of its proper divisors (124243).

12786317 is a wasteful number, since it uses less digits than its factorization.

12786317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124242.

The product of its digits is 14112, while the sum is 35.

The square root of 12786317 is about 3575.7959952995. The cubic root of 12786317 is about 233.8380365578.

The spelling of 12786317 in words is "twelve million, seven hundred eighty-six thousand, three hundred seventeen".