11561117 has 2 divisors, whose sum is σ = 11561118. Its totient is φ = 11561116.

The previous prime is 11561089. The next prime is 11561159. The reversal of 11561117 is 71116511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11383876 + 177241 = 3374^2 + 421^2 .

It is a cyclic number.

It is not a de Polignac number, because 11561117 - 2¹⁴ = 11544733 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11561092 and 11561101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11561197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5780558 + 5780559.

It is an arithmetic number, because the mean of its divisors is an integer number (5780559).

Almost surely, 2^11561117 is an apocalyptic number.

It is an amenable number.

11561117 is a deficient number, since it is larger than the sum of its proper divisors (1).

11561117 is an equidigital number, since it uses as much as digits as its factorization.

11561117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 210, while the sum is 23.

The square root of 11561117 is about 3400.1642607380. The cubic root of 11561117 is about 226.1170263468.

Adding to 11561117 its reverse (71116511), we get a palindrome (82677628).

The spelling of 11561117 in words is "eleven million, five hundred sixty-one thousand, one hundred seventeen".