11561441 has 4 divisors (see below), whose sum is σ = 11673792. Its totient is φ = 11449092.

The previous prime is 11561423. The next prime is 11561447. The reversal of 11561441 is 14416511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14416511 = 2221 ⋅6491.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11561441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11561447) 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 in 3 ways as a sum of consecutive naturals, for example, 56021 + ... + 56226.

It is an arithmetic number, because the mean of its divisors is an integer number (2918448).

Almost surely, 2^11561441 is an apocalyptic number.

It is an amenable number.

11561441 is a deficient number, since it is larger than the sum of its proper divisors (112351).

11561441 is a wasteful number, since it uses less digits than its factorization.

11561441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112350.

The product of its digits is 480, while the sum is 23.

The square root of 11561441 is about 3400.2119051612. The cubic root of 11561441 is about 226.1191386350.

Adding to 11561441 its reverse (14416511), we get a palindrome (25977952).

The spelling of 11561441 in words is "eleven million, five hundred sixty-one thousand, four hundred forty-one".