12892981 has 2 divisors, whose sum is σ = 12892982. Its totient is φ = 12892980.

The previous prime is 12892973. The next prime is 12893009. The reversal of 12892981 is 18929821.

12892981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10304100 + 2588881 = 3210^2 + 1609^2 .

It is an emirp because it is prime and its reverse (18929821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12892981 - 2³ = 12892973 is a prime.

It is a super-2 number, since 2×12892981² = 332457918132722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12892921) 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, 6446490 + 6446491.

It is an arithmetic number, because the mean of its divisors is an integer number (6446491).

Almost surely, 2^12892981 is an apocalyptic number.

It is an amenable number.

12892981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12892981 is an equidigital number, since it uses as much as digits as its factorization.

12892981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 40.

The square root of 12892981 is about 3590.6797406619. The cubic root of 12892981 is about 234.4864657592.

It can be divided in two parts, 1 and 2892981, that added together give a palindrome (2892982).

The spelling of 12892981 in words is "twelve million, eight hundred ninety-two thousand, nine hundred eighty-one".