128023201 has 4 divisors (see below), whose sum is σ = 130122004. Its totient is φ = 125924400.

The previous prime is 128023199. The next prime is 128023223. The reversal of 128023201 is 102320821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34398225 + 93624976 = 5865^2 + 9676^2 .

It is a cyclic number.

It is not a de Polignac number, because 128023201 - 2¹ = 128023199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128023001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049310 + ... + 1049431.

It is an arithmetic number, because the mean of its divisors is an integer number (32530501).

Almost surely, 2^128023201 is an apocalyptic number.

It is an amenable number.

128023201 is a deficient number, since it is larger than the sum of its proper divisors (2098803).

128023201 is an equidigital number, since it uses as much as digits as its factorization.

128023201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2098802.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 128023201 is about 11314.7338015527. The cubic root of 128023201 is about 503.9988675229.

The spelling of 128023201 in words is "one hundred twenty-eight million, twenty-three thousand, two hundred one".