128412281 has 2 divisors, whose sum is σ = 128412282. Its totient is φ = 128412280.

The previous prime is 128412257. The next prime is 128412293. The reversal of 128412281 is 182214821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98327056 + 30085225 = 9916^2 + 5485^2 .

It is an emirp because it is prime and its reverse (182214821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128412281 - 2⁶ = 128412217 is a prime.

It is a super-2 number, since 2×128412281² = 32979427823245922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128411281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64206140 + 64206141.

It is an arithmetic number, because the mean of its divisors is an integer number (64206141).

Almost surely, 2^128412281 is an apocalyptic number.

It is an amenable number.

128412281 is a deficient number, since it is larger than the sum of its proper divisors (1).

128412281 is an equidigital number, since it uses as much as digits as its factorization.

128412281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2048, while the sum is 29.

The square root of 128412281 is about 11331.9142690015. The cubic root of 128412281 is about 504.5089249669.

The spelling of 128412281 in words is "one hundred twenty-eight million, four hundred twelve thousand, two hundred eighty-one".