128320001 has 2 divisors, whose sum is σ = 128320002. Its totient is φ = 128320000.

The previous prime is 128319979. The next prime is 128320019. The reversal of 128320001 is 100023821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128232976 + 87025 = 11324^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 128320001 - 2¹⁸ = 128057857 is a prime.

It is a Chen prime.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (128320021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64160000 + 64160001.

It is an arithmetic number, because the mean of its divisors is an integer number (64160001).

Almost surely, 2^128320001 is an apocalyptic number.

It is an amenable number.

128320001 is a deficient number, since it is larger than the sum of its proper divisors (1).

128320001 is an equidigital number, since it uses as much as digits as its factorization.

128320001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 128320001 is about 11327.8418509441. The cubic root of 128320001 is about 504.3880454587.

Adding to 128320001 its reverse (100023821), we get a palindrome (228343822).

The spelling of 128320001 in words is "one hundred twenty-eight million, three hundred twenty thousand, one".