128296161 has 72 divisors (see below), whose sum is σ = 231814440. Its totient is φ = 67931136.

The previous prime is 128296153. The next prime is 128296163. The reversal of 128296161 is 161692821.

128296161 is a `hidden beast` number, since 12 + 8 + 29 + 616 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 33350625 + 94945536 = 5775^2 + 9744^2 .

It is not a de Polignac number, because 128296161 - 2³ = 128296153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128296163) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 817095 + ... + 817251.

It is an arithmetic number, because the mean of its divisors is an integer number (3219645).

Almost surely, 2^128296161 is an apocalyptic number.

It is an amenable number.

128296161 is a deficient number, since it is larger than the sum of its proper divisors (103518279).

128296161 is a wasteful number, since it uses less digits than its factorization.

128296161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 293 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 128296161 is about 11326.7895274875. The cubic root of 128296161 is about 504.3568075232.

The spelling of 128296161 in words is "one hundred twenty-eight million, two hundred ninety-six thousand, one hundred sixty-one".