12681117 has 20 divisors (see below), whose sum is σ = 19352256. Its totient is φ = 8271720.

The previous prime is 12681103. The next prime is 12681127. The reversal of 12681117 is 71118621.

It is not a de Polignac number, because 12681117 - 2¹⁴ = 12664733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12681127) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2142 + ... + 5472.

Almost surely, 2^12681117 is an apocalyptic number.

It is an amenable number.

12681117 is a deficient number, since it is larger than the sum of its proper divisors (6671139).

12681117 is an equidigital number, since it uses as much as digits as its factorization.

12681117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390 (or 3381 counting only the distinct ones).

The product of its digits is 672, while the sum is 27.

The square root of 12681117 is about 3561.0556019248. The cubic root of 12681117 is about 233.1949653555.

Adding to 12681117 its reverse (71118621), we get a palindrome (83799738).

The spelling of 12681117 in words is "twelve million, six hundred eighty-one thousand, one hundred seventeen".