128116801 has 4 divisors (see below), whose sum is σ = 129250692. Its totient is φ = 126982912.

The previous prime is 128116799. The next prime is 128116817. The reversal of 128116801 is 108611821.

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 67650625 + 60466176 = 8225^2 + 7776^2 .

It is a cyclic number.

It is not a de Polignac number, because 128116801 - 2¹ = 128116799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128116801.

It is not an unprimeable number, because it can be changed into a prime (128116861) 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, 566776 + ... + 567001.

It is an arithmetic number, because the mean of its divisors is an integer number (32312673).

Almost surely, 2^128116801 is an apocalyptic number.

It is an amenable number.

128116801 is a deficient number, since it is larger than the sum of its proper divisors (1133891).

128116801 is a wasteful number, since it uses less digits than its factorization.

128116801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133890.

The product of its (nonzero) digits is 768, while the sum is 28.

The square root of 128116801 is about 11318.8692456446. The cubic root of 128116801 is about 504.1216650618.

The spelling of 128116801 in words is "one hundred twenty-eight million, one hundred sixteen thousand, eight hundred one".