1165155001 has 2 divisors, whose sum is σ = 1165155002. Its totient is φ = 1165155000.

The previous prime is 1165154983. The next prime is 1165155007. The reversal of 1165155001 is 1005515611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1108890000 + 56265001 = 33300^2 + 7501^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165155001 - 2⁷ = 1165154873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1165155007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582577500 + 582577501.

It is an arithmetic number, because the mean of its divisors is an integer number (582577501).

Almost surely, 2^1165155001 is an apocalyptic number.

It is an amenable number.

1165155001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165155001 is an equidigital number, since it uses as much as digits as its factorization.

1165155001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 750, while the sum is 25.

The square root of 1165155001 is about 34134.3668609804. The cubic root of 1165155001 is about 1052.2717257602.

The spelling of 1165155001 in words is "one billion, one hundred sixty-five million, one hundred fifty-five thousand, one".