12726305 has 4 divisors (see below), whose sum is σ = 15271572. Its totient is φ = 10181040.

The previous prime is 12726299. The next prime is 12726313. The reversal of 12726305 is 50362721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9296401 + 3429904 = 3049^2 + 1852^2 .

It is not a de Polignac number, because 12726305 - 2¹⁰ = 12725281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272626 + ... + 1272635.

It is an arithmetic number, because the mean of its divisors is an integer number (3817893).

Almost surely, 2^12726305 is an apocalyptic number.

It is an amenable number.

12726305 is a deficient number, since it is larger than the sum of its proper divisors (2545267).

12726305 is an equidigital number, since it uses as much as digits as its factorization.

12726305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545266.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 12726305 is about 3567.3947076263. The cubic root of 12726305 is about 233.4716266361.

It can be divided in two parts, 12726 and 305, that added together give a palindrome (13031).

The spelling of 12726305 in words is "twelve million, seven hundred twenty-six thousand, three hundred five".