12729417 has 4 divisors (see below), whose sum is σ = 16972560. Its totient is φ = 8486276.

The previous prime is 12729391. The next prime is 12729439. The reversal of 12729417 is 71492721.

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 12729417 - 2¹¹ = 12727369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12729217) 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, 2121567 + ... + 2121572.

It is an arithmetic number, because the mean of its divisors is an integer number (4243140).

Almost surely, 2^12729417 is an apocalyptic number.

It is an amenable number.

12729417 is a deficient number, since it is larger than the sum of its proper divisors (4243143).

12729417 is an equidigital number, since it uses as much as digits as its factorization.

12729417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4243142.

The product of its digits is 7056, while the sum is 33.

The square root of 12729417 is about 3567.8308536140. The cubic root of 12729417 is about 233.4906555815.

The spelling of 12729417 in words is "twelve million, seven hundred twenty-nine thousand, four hundred seventeen".