12681911 has 8 divisors (see below), whose sum is σ = 14563200. Its totient is φ = 10922040.

The previous prime is 12681871. The next prime is 12681931. The reversal of 12681911 is 11918621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12681911 - 2¹⁸ = 12419767 is a prime.

It is a super-2 number, since 2×12681911² = 321661733223842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12681931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30131 + ... + 30548.

It is an arithmetic number, because the mean of its divisors is an integer number (1820400).

Almost surely, 2^12681911 is an apocalyptic number.

12681911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12681911 is a deficient number, since it is larger than the sum of its proper divisors (1881289).

12681911 is a wasteful number, since it uses less digits than its factorization.

12681911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60709.

The product of its digits is 864, while the sum is 29.

The square root of 12681911 is about 3561.1670839768. The cubic root of 12681911 is about 233.1998322490.

The spelling of 12681911 in words is "twelve million, six hundred eighty-one thousand, nine hundred eleven".