12826981 has 2 divisors, whose sum is σ = 12826982. Its totient is φ = 12826980.

The previous prime is 12826951. The next prime is 12826999. The reversal of 12826981 is 18962821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8946081 + 3880900 = 2991^2 + 1970^2 .

It is a cyclic number.

It is not a de Polignac number, because 12826981 - 2⁹ = 12826469 is a prime.

It is a super-2 number, since 2×12826981² = 329062883148722, 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 12826981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12826921) 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, 6413490 + 6413491.

It is an arithmetic number, because the mean of its divisors is an integer number (6413491).

Almost surely, 2^12826981 is an apocalyptic number.

It is an amenable number.

12826981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12826981 is an equidigital number, since it uses as much as digits as its factorization.

12826981 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 12826981 is about 3581.4774884117. The cubic root of 12826981 is about 234.0856639630.

The spelling of 12826981 in words is "twelve million, eight hundred twenty-six thousand, nine hundred eighty-one".