128845081 has 2 divisors, whose sum is σ = 128845082. Its totient is φ = 128845080.

The previous prime is 128845051. The next prime is 128845097. The reversal of 128845081 is 180548821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75846681 + 52998400 = 8709^2 + 7280^2 .

It is a cyclic number.

It is not a de Polignac number, because 128845081 - 2¹⁹ = 128320793 is a prime.

It is a super-2 number, since 2×128845081² = 33202109795793122, 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 128845081.

It is not a weakly prime, because it can be changed into another prime (128845051) 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, 64422540 + 64422541.

It is an arithmetic number, because the mean of its divisors is an integer number (64422541).

Almost surely, 2^128845081 is an apocalyptic number.

It is an amenable number.

128845081 is a deficient number, since it is larger than the sum of its proper divisors (1).

128845081 is an equidigital number, since it uses as much as digits as its factorization.

128845081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20480, while the sum is 37.

The square root of 128845081 is about 11350.9947141209. The cubic root of 128845081 is about 505.0750873546.

The spelling of 128845081 in words is "one hundred twenty-eight million, eight hundred forty-five thousand, eighty-one".