12865219 has 4 divisors (see below), whose sum is σ = 12876280. Its totient is φ = 12854160.

The previous prime is 12865199. The next prime is 12865247. The reversal of 12865219 is 91256821.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12865219 - 2⁷ = 12865091 is a prime.

It is a super-2 number, since 2×12865219² = 331027719835922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12865289) 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 in 3 ways as a sum of consecutive naturals, for example, 3549 + ... + 6190.

It is an arithmetic number, because the mean of its divisors is an integer number (3219070).

Almost surely, 2^12865219 is an apocalyptic number.

12865219 is a deficient number, since it is larger than the sum of its proper divisors (11061).

12865219 is an equidigital number, since it uses as much as digits as its factorization.

12865219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11060.

The product of its digits is 8640, while the sum is 34.

The square root of 12865219 is about 3586.8118155264. The cubic root of 12865219 is about 234.3180410090.

The spelling of 12865219 in words is "twelve million, eight hundred sixty-five thousand, two hundred nineteen".