12681819 has 16 divisors (see below), whose sum is σ = 19017600. Its totient is φ = 8351208.

The previous prime is 12681817. The next prime is 12681829. The reversal of 12681819 is 91818621.

It is not a de Polignac number, because 12681819 - 2¹ = 12681817 is a prime.

It is a super-2 number, since 2×12681819² = 321657066297522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12681817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 589 + ... + 5070.

It is an arithmetic number, because the mean of its divisors is an integer number (1188600).

Almost surely, 2^12681819 is an apocalyptic number.

12681819 is a deficient number, since it is larger than the sum of its proper divisors (6335781).

12681819 is an equidigital number, since it uses as much as digits as its factorization.

12681819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751 (or 5745 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 12681819 is about 3561.1541668397. The cubic root of 12681819 is about 233.1992683373.

The spelling of 12681819 in words is "twelve million, six hundred eighty-one thousand, eight hundred nineteen".