12810019 has 4 divisors (see below), whose sum is σ = 12923496. Its totient is φ = 12696544.

The previous prime is 12810013. The next prime is 12810023. The reversal of 12810019 is 91001821.

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

It is a cyclic number.

It is not a de Polignac number, because 12810019 - 2⁵ = 12809987 is a prime.

It is a super-2 number, since 2×12810019² = 328193173560722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12810013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56569 + ... + 56794.

It is an arithmetic number, because the mean of its divisors is an integer number (3230874).

Almost surely, 2^12810019 is an apocalyptic number.

12810019 is a deficient number, since it is larger than the sum of its proper divisors (113477).

12810019 is a wasteful number, since it uses less digits than its factorization.

12810019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113476.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 12810019 is about 3579.1086879278. The cubic root of 12810019 is about 233.9824359184.

The spelling of 12810019 in words is "twelve million, eight hundred ten thousand, nineteen".