128235001 has 2 divisors, whose sum is σ = 128235002. Its totient is φ = 128235000.

The previous prime is 128234989. The next prime is 128235011. The reversal of 128235001 is 100532821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128232976 + 2025 = 11324^2 + 45^2 .

It is a cyclic number.

It is not a de Polignac number, because 128235001 - 2⁵ = 128234969 is a prime.

It is not a weakly prime, because it can be changed into another prime (128235011) 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, 64117500 + 64117501.

It is an arithmetic number, because the mean of its divisors is an integer number (64117501).

Almost surely, 2^128235001 is an apocalyptic number.

It is an amenable number.

128235001 is a deficient number, since it is larger than the sum of its proper divisors (1).

128235001 is an equidigital number, since it uses as much as digits as its factorization.

128235001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 128235001 is about 11324.0894115156. The cubic root of 128235001 is about 504.2766508892.

Adding to 128235001 its reverse (100532821), we get a palindrome (228767822).

The spelling of 128235001 in words is "one hundred twenty-eight million, two hundred thirty-five thousand, one".