11155541 has 2 divisors, whose sum is σ = 11155542. Its totient is φ = 11155540.

The previous prime is 11155513. The next prime is 11155549. The reversal of 11155541 is 14555111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8145316 + 3010225 = 2854^2 + 1735^2 .

It is a cyclic number.

It is not a de Polignac number, because 11155541 - 2⁶ = 11155477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11155549) 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, 5577770 + 5577771.

It is an arithmetic number, because the mean of its divisors is an integer number (5577771).

Almost surely, 2^11155541 is an apocalyptic number.

It is an amenable number.

11155541 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155541 is an equidigital number, since it uses as much as digits as its factorization.

11155541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 500, while the sum is 23.

The square root of 11155541 is about 3339.9911676530. The cubic root of 11155541 is about 223.4413494471.

The spelling of 11155541 in words is "eleven million, one hundred fifty-five thousand, five hundred forty-one".