12729455 has 4 divisors (see below), whose sum is σ = 15275352. Its totient is φ = 10183560.

The previous prime is 12729439. The next prime is 12729491. The reversal of 12729455 is 55492721.

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

It is not a de Polignac number, because 12729455 - 2⁴ = 12729439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272941 + ... + 1272950.

It is an arithmetic number, because the mean of its divisors is an integer number (3818838).

Almost surely, 2^12729455 is an apocalyptic number.

12729455 is a deficient number, since it is larger than the sum of its proper divisors (2545897).

12729455 is an equidigital number, since it uses as much as digits as its factorization.

12729455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545896.

The product of its digits is 25200, while the sum is 35.

The square root of 12729455 is about 3567.8361789746. The cubic root of 12729455 is about 233.4908879209.

The spelling of 12729455 in words is "twelve million, seven hundred twenty-nine thousand, four hundred fifty-five".