12728519 has 2 divisors, whose sum is σ = 12728520. Its totient is φ = 12728518.

The previous prime is 12728509. The next prime is 12728539. The reversal of 12728519 is 91582721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12728519 - 2⁴ = 12728503 is a prime.

It is a super-2 number, since 2×12728519² = 324030391866722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12728509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6364259 + 6364260.

It is an arithmetic number, because the mean of its divisors is an integer number (6364260).

Almost surely, 2^12728519 is an apocalyptic number.

12728519 is a deficient number, since it is larger than the sum of its proper divisors (1).

12728519 is an equidigital number, since it uses as much as digits as its factorization.

12728519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 35.

The square root of 12728519 is about 3567.7050046213. The cubic root of 12728519 is about 233.4851648996.

The spelling of 12728519 in words is "twelve million, seven hundred twenty-eight thousand, five hundred nineteen".