12692881 has 2 divisors, whose sum is σ = 12692882. Its totient is φ = 12692880.

The previous prime is 12692879. The next prime is 12692921. The reversal of 12692881 is 18829621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12362256 + 330625 = 3516^2 + 575^2 .

It is an emirp because it is prime and its reverse (18829621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12692881 - 2¹ = 12692879 is a prime.

It is a super-2 number, since 2×12692881² = 322218456160322, which contains 22 as substring.

Together with 12692879, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12692881.

It is not a weakly prime, because it can be changed into another prime (12692831) 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 as a sum of consecutive naturals, namely, 6346440 + 6346441.

It is an arithmetic number, because the mean of its divisors is an integer number (6346441).

Almost surely, 2^12692881 is an apocalyptic number.

It is an amenable number.

12692881 is a deficient number, since it is larger than the sum of its proper divisors (1).

12692881 is an equidigital number, since it uses as much as digits as its factorization.

12692881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 37.

The square root of 12692881 is about 3562.7069764436. The cubic root of 12692881 is about 233.2670530564.

The spelling of 12692881 in words is "twelve million, six hundred ninety-two thousand, eight hundred eighty-one".