128797201 has 4 divisors (see below), whose sum is σ = 138704692. Its totient is φ = 118889712.

The previous prime is 128797189. The next prime is 128797211. The reversal of 128797201 is 102797821.

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 22810176 + 105987025 = 4776^2 + 10295^2 .

It is a cyclic number.

It is not a de Polignac number, because 128797201 - 2⁷ = 128797073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128797211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4953726 + ... + 4953751.

It is an arithmetic number, because the mean of its divisors is an integer number (34676173).

Almost surely, 2^128797201 is an apocalyptic number.

It is an amenable number.

128797201 is a deficient number, since it is larger than the sum of its proper divisors (9907491).

128797201 is an equidigital number, since it uses as much as digits as its factorization.

128797201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9907490.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 128797201 is about 11348.8854518847. The cubic root of 128797201 is about 505.0125161098.

The spelling of 128797201 in words is "one hundred twenty-eight million, seven hundred ninety-seven thousand, two hundred one".