11557541 has 2 divisors, whose sum is σ = 11557542. Its totient is φ = 11557540.

The previous prime is 11557537. The next prime is 11557543. The reversal of 11557541 is 14575511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6477025 + 5080516 = 2545^2 + 2254^2 .

It is a cyclic number.

It is not a de Polignac number, because 11557541 - 2² = 11557537 is a prime.

Together with 11557543, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11557543) 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, 5778770 + 5778771.

It is an arithmetic number, because the mean of its divisors is an integer number (5778771).

Almost surely, 2^11557541 is an apocalyptic number.

It is an amenable number.

11557541 is a deficient number, since it is larger than the sum of its proper divisors (1).

11557541 is an equidigital number, since it uses as much as digits as its factorization.

11557541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3500, while the sum is 29.

The square root of 11557541 is about 3399.6383631204. The cubic root of 11557541 is about 226.0937103221.

The spelling of 11557541 in words is "eleven million, five hundred fifty-seven thousand, five hundred forty-one".