12955681 has 2 divisors, whose sum is σ = 12955682. Its totient is φ = 12955680.

The previous prime is 12955673. The next prime is 12955687. The reversal of 12955681 is 18655921.

12955681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8294400 + 4661281 = 2880^2 + 2159^2 .

It is a cyclic number.

It is not a de Polignac number, because 12955681 - 2³ = 12955673 is a prime.

It is a super-2 number, since 2×12955681² = 335699340347522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12955681.

It is not a weakly prime, because it can be changed into another prime (12955687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6477840 + 6477841.

It is an arithmetic number, because the mean of its divisors is an integer number (6477841).

Almost surely, 2^12955681 is an apocalyptic number.

It is an amenable number.

12955681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12955681 is an equidigital number, since it uses as much as digits as its factorization.

12955681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 37.

The square root of 12955681 is about 3599.4000889037. The cubic root of 12955681 is about 234.8659624949.

The spelling of 12955681 in words is "twelve million, nine hundred fifty-five thousand, six hundred eighty-one".