1128161 has 2 divisors, whose sum is σ = 1128162. Its totient is φ = 1128160.

The previous prime is 1128151. The next prime is 1128181. The reversal of 1128161 is 1618211.

It is an a-pointer prime, because the next prime (1128181) can be obtained adding 1128161 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 819025 + 309136 = 905^2 + 556^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1128151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564080 + 564081.

It is an arithmetic number, because the mean of its divisors is an integer number (564081).

2^1128161 is an apocalyptic number.

It is an amenable number.

1128161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128161 is an equidigital number, since it uses as much as digits as its factorization.

1128161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 20.

The square root of 1128161 is about 1062.1492362187. The cubic root of 1128161 is about 104.1015096167.

The spelling of 1128161 in words is "one million, one hundred twenty-eight thousand, one hundred sixty-one".