11224561 has 2 divisors, whose sum is σ = 11224562. Its totient is φ = 11224560.

The previous prime is 11224559. The next prime is 11224583. The reversal of 11224561 is 16542211.

It is an a-pointer prime, because the next prime (11224583) can be obtained adding 11224561 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7595536 + 3629025 = 2756^2 + 1905^2 .

It is a cyclic number.

It is not a de Polignac number, because 11224561 - 2¹ = 11224559 is a prime.

Together with 11224559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11228561) 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, 5612280 + 5612281.

It is an arithmetic number, because the mean of its divisors is an integer number (5612281).

Almost surely, 2^11224561 is an apocalyptic number.

It is an amenable number.

11224561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11224561 is an equidigital number, since it uses as much as digits as its factorization.

11224561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 22.

The square root of 11224561 is about 3350.3075978184. The cubic root of 11224561 is about 223.9012173388.

Adding to 11224561 its reverse (16542211), we get a palindrome (27766772).

The spelling of 11224561 in words is "eleven million, two hundred twenty-four thousand, five hundred sixty-one".