12729567 has 4 divisors (see below), whose sum is σ = 16972760. Its totient is φ = 8486376.

The previous prime is 12729559. The next prime is 12729571. The reversal of 12729567 is 76592721.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12729567 - 2³ = 12729559 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 (12729547) 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, 2121592 + ... + 2121597.

It is an arithmetic number, because the mean of its divisors is an integer number (4243190).

Almost surely, 2^12729567 is an apocalyptic number.

12729567 is a deficient number, since it is larger than the sum of its proper divisors (4243193).

12729567 is an equidigital number, since it uses as much as digits as its factorization.

12729567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4243192.

The product of its digits is 52920, while the sum is 39.

The square root of 12729567 is about 3567.8518747280. The cubic root of 12729567 is about 233.4915727081.

The spelling of 12729567 in words is "twelve million, seven hundred twenty-nine thousand, five hundred sixty-seven".