12691712 has 36 divisors (see below), whose sum is σ = 27643056. Its totient is φ = 5767680.

The previous prime is 12691711. The next prime is 12691717. The reversal of 12691712 is 21719621.

It is a super-2 number, since 2×12691712² = 322159106981888, which contains 22 as substring.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (12691711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563 + ... + 5069.

Almost surely, 2^12691712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12691712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13821528).

12691712 is an abundant number, since it is smaller than the sum of its proper divisors (14951344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12691712 is an equidigital number, since it uses as much as digits as its factorization.

12691712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4534 (or 4520 counting only the distinct ones).

The product of its digits is 1512, while the sum is 29.

The square root of 12691712 is about 3562.5429120223. The cubic root of 12691712 is about 233.2598916259.

The spelling of 12691712 in words is "twelve million, six hundred ninety-one thousand, seven hundred twelve".