128201 has 2 divisors, whose sum is σ = 128202. Its totient is φ = 128200.

The previous prime is 128189. The next prime is 128203. The reversal of 128201 is 102821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121801 + 6400 = 349^2 + 80^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128201 is a prime.

Together with 128203, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (128203) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64100 + 64101.

It is an arithmetic number, because the mean of its divisors is an integer number (64101).

2¹²⁸²⁰¹ is an apocalyptic number.

It is an amenable number.

128201 is a deficient number, since it is larger than the sum of its proper divisors (1).

128201 is an equidigital number, since it uses as much as digits as its factorization.

128201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 128201 is about 358.0516722486. The cubic root of 128201 is about 50.4232077967.

It can be divided in two parts, 12820 and 1, that added together give a palindrome (12821).

The spelling of 128201 in words is "one hundred twenty-eight thousand, two hundred one".