12800019 has 4 divisors (see below), whose sum is σ = 17066696. Its totient is φ = 8533344.

The previous prime is 12800017. The next prime is 12800041. The reversal of 12800019 is 91000821.

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

It is not a de Polignac number, because 12800019 - 2¹ = 12800017 is a prime.

It is a super-2 number, since 2×12800019² = 327680972800722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12799968 and 12800004.

It is not an unprimeable number, because it can be changed into a prime (12800017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2133334 + ... + 2133339.

It is an arithmetic number, because the mean of its divisors is an integer number (4266674).

Almost surely, 2^12800019 is an apocalyptic number.

12800019 is a deficient number, since it is larger than the sum of its proper divisors (4266677).

12800019 is an equidigital number, since it uses as much as digits as its factorization.

12800019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4266676.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 12800019 is about 3577.7114193294. The cubic root of 12800019 is about 233.9215347993.

The spelling of 12800019 in words is "twelve million, eight hundred thousand, nineteen".