128436601 has 2 divisors, whose sum is σ = 128436602. Its totient is φ = 128436600.

The previous prime is 128436593. The next prime is 128436631. The reversal of 128436601 is 106634821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110754576 + 17682025 = 10524^2 + 4205^2 .

It is a cyclic number.

It is not a de Polignac number, because 128436601 - 2³ = 128436593 is a prime.

It is not a weakly prime, because it can be changed into another prime (128436631) 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, 64218300 + 64218301.

It is an arithmetic number, because the mean of its divisors is an integer number (64218301).

Almost surely, 2^128436601 is an apocalyptic number.

It is an amenable number.

128436601 is a deficient number, since it is larger than the sum of its proper divisors (1).

128436601 is an equidigital number, since it uses as much as digits as its factorization.

128436601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 128436601 is about 11332.9872937368. The cubic root of 128436601 is about 504.5407726024.

The spelling of 128436601 in words is "one hundred twenty-eight million, four hundred thirty-six thousand, six hundred one".