128695201 has 2 divisors, whose sum is σ = 128695202. Its totient is φ = 128695200.

The previous prime is 128695181. The next prime is 128695207. The reversal of 128695201 is 102596821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88360000 + 40335201 = 9400^2 + 6351^2 .

It is a cyclic number.

It is not a de Polignac number, because 128695201 - 2¹¹ = 128693153 is a prime.

It is a super-3 number, since 3×128695201³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (128695207) 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, 64347600 + 64347601.

It is an arithmetic number, because the mean of its divisors is an integer number (64347601).

Almost surely, 2^128695201 is an apocalyptic number.

It is an amenable number.

128695201 is a deficient number, since it is larger than the sum of its proper divisors (1).

128695201 is an equidigital number, since it uses as much as digits as its factorization.

128695201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 128695201 is about 11344.3907284614. The cubic root of 128695201 is about 504.8791672476.

The spelling of 128695201 in words is "one hundred twenty-eight million, six hundred ninety-five thousand, two hundred one".