12864019 has 12 divisors (see below), whose sum is σ = 15845544. Its totient is φ = 10377024.

The previous prime is 12864013. The next prime is 12864031. The reversal of 12864019 is 91046821.

It is a happy number.

It is not a de Polignac number, because 12864019 - 2⁷ = 12863891 is a prime.

It is a super-2 number, since 2×12864019² = 330965969664722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12864013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6889 + ... + 8554.

It is an arithmetic number, because the mean of its divisors is an integer number (1320462).

Almost surely, 2^12864019 is an apocalyptic number.

12864019 is a deficient number, since it is larger than the sum of its proper divisors (2981525).

12864019 is a wasteful number, since it uses less digits than its factorization.

12864019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15474 (or 15467 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 12864019 is about 3586.6445321498. The cubic root of 12864019 is about 234.3107554641.

The spelling of 12864019 in words is "twelve million, eight hundred sixty-four thousand, nineteen".