12729071 has 4 divisors (see below), whose sum is σ = 12748392. Its totient is φ = 12709752.

The previous prime is 12729061. The next prime is 12729091. The reversal of 12729071 is 17092721.

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

It is a cyclic number.

It is not a de Polignac number, because 12729071 - 2¹⁰ = 12728047 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 (12729061) 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, 8636 + ... + 10001.

It is an arithmetic number, because the mean of its divisors is an integer number (3187098).

Almost surely, 2^12729071 is an apocalyptic number.

12729071 is a deficient number, since it is larger than the sum of its proper divisors (19321).

12729071 is an equidigital number, since it uses as much as digits as its factorization.

12729071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19320.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 12729071 is about 3567.7823644387. The cubic root of 12729071 is about 233.4885400487.

The spelling of 12729071 in words is "twelve million, seven hundred twenty-nine thousand, seventy-one".