1155006161 has 2 divisors, whose sum is σ = 1155006162. Its totient is φ = 1155006160.

The previous prime is 1155006119. The next prime is 1155006173. The reversal of 1155006161 is 1616005511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988725136 + 166281025 = 31444^2 + 12895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155006161 - 2¹⁴ = 1154989777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1155006161.

It is not a weakly prime, because it can be changed into another prime (1155006761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577503080 + 577503081.

It is an arithmetic number, because the mean of its divisors is an integer number (577503081).

Almost surely, 2^1155006161 is an apocalyptic number.

It is an amenable number.

1155006161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155006161 is an equidigital number, since it uses as much as digits as its factorization.

1155006161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 1155006161 is about 33985.3815779667. The cubic root of 1155006161 is about 1049.2076141164.

The spelling of 1155006161 in words is "one billion, one hundred fifty-five million, six thousand, one hundred sixty-one".