12865019 has 2 divisors, whose sum is σ = 12865020. Its totient is φ = 12865018.

The previous prime is 12865003. The next prime is 12865057. The reversal of 12865019 is 91056821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12865019 - 2⁴ = 12865003 is a prime.

It is a super-2 number, since 2×12865019² = 331017427740722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12865319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6432509 + 6432510.

It is an arithmetic number, because the mean of its divisors is an integer number (6432510).

Almost surely, 2^12865019 is an apocalyptic number.

12865019 is a deficient number, since it is larger than the sum of its proper divisors (1).

12865019 is an equidigital number, since it uses as much as digits as its factorization.

12865019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 12865019 is about 3586.7839355055. The cubic root of 12865019 is about 234.3168267830.

The spelling of 12865019 in words is "twelve million, eight hundred sixty-five thousand, nineteen".