12810481 has 2 divisors, whose sum is σ = 12810482. Its totient is φ = 12810480.

The previous prime is 12810463. The next prime is 12810521. The reversal of 12810481 is 18401821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7612081 + 5198400 = 2759^2 + 2280^2 .

It is an emirp because it is prime and its reverse (18401821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12810481 - 2⁷ = 12810353 is a prime.

It is a super-2 number, since 2×12810481² = 328216846902722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12810451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6405240 + 6405241.

It is an arithmetic number, because the mean of its divisors is an integer number (6405241).

Almost surely, 2^12810481 is an apocalyptic number.

It is an amenable number.

12810481 is a deficient number, since it is larger than the sum of its proper divisors (1).

12810481 is an equidigital number, since it uses as much as digits as its factorization.

12810481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 12810481 is about 3579.1732285543. The cubic root of 12810481 is about 233.9852487840.

It can be divided in two parts, 128 and 10481, that added together give a square (10609 = 103²).

The spelling of 12810481 in words is "twelve million, eight hundred ten thousand, four hundred eighty-one".