12896021 has 2 divisors, whose sum is σ = 12896022. Its totient is φ = 12896020.

The previous prime is 12895999. The next prime is 12896063. The reversal of 12896021 is 12069821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12888100 + 7921 = 3590^2 + 89^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12896021 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12896621) 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, 6448010 + 6448011.

It is an arithmetic number, because the mean of its divisors is an integer number (6448011).

Almost surely, 2^12896021 is an apocalyptic number.

It is an amenable number.

12896021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12896021 is an equidigital number, since it uses as much as digits as its factorization.

12896021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 12896021 is about 3591.1030338881. The cubic root of 12896021 is about 234.5048939473.

The spelling of 12896021 in words is "twelve million, eight hundred ninety-six thousand, twenty-one".