1181065541 has 2 divisors, whose sum is σ = 1181065542. Its totient is φ = 1181065540.

The previous prime is 1181065489. The next prime is 1181065553. The reversal of 1181065541 is 1455601811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1159674916 + 21390625 = 34054^2 + 4625^2 .

It is a cyclic number.

It is not a de Polignac number, because 1181065541 - 2¹⁰ = 1181064517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1181065498 and 1181065507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1181065241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 590532770 + 590532771.

It is an arithmetic number, because the mean of its divisors is an integer number (590532771).

Almost surely, 2^1181065541 is an apocalyptic number.

It is an amenable number.

1181065541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1181065541 is an equidigital number, since it uses as much as digits as its factorization.

1181065541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 32.

The square root of 1181065541 is about 34366.6341238126. The cubic root of 1181065541 is about 1057.0397831284.

The spelling of 1181065541 in words is "one billion, one hundred eighty-one million, sixty-five thousand, five hundred forty-one".