12729055 has 4 divisors (see below), whose sum is σ = 15274872. Its totient is φ = 10183240.

The previous prime is 12729029. The next prime is 12729061. The reversal of 12729055 is 55092721.

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

It is not a de Polignac number, because 12729055 - 2⁷ = 12728927 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272901 + ... + 1272910.

It is an arithmetic number, because the mean of its divisors is an integer number (3818718).

Almost surely, 2^12729055 is an apocalyptic number.

12729055 is a deficient number, since it is larger than the sum of its proper divisors (2545817).

12729055 is an equidigital number, since it uses as much as digits as its factorization.

12729055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545816.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 12729055 is about 3567.7801221488. The cubic root of 12729055 is about 233.4884422196.

The spelling of 12729055 in words is "twelve million, seven hundred twenty-nine thousand, fifty-five".