11560221 has 12 divisors (see below), whose sum is σ = 17680572. Its totient is φ = 7253376.

The previous prime is 11560141. The next prime is 11560231. The reversal of 11560221 is 12206511.

It can be written as a sum of positive squares in 2 ways, for example, as 9696996 + 1863225 = 3114^2 + 1365^2 .

It is not a de Polignac number, because 11560221 - 2¹⁷ = 11429149 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11560194 and 11560203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11560231) 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 11 ways as a sum of consecutive naturals, for example, 37626 + ... + 37931.

It is an arithmetic number, because the mean of its divisors is an integer number (1473381).

Almost surely, 2^11560221 is an apocalyptic number.

It is an amenable number.

11560221 is a deficient number, since it is larger than the sum of its proper divisors (6120351).

11560221 is a wasteful number, since it uses less digits than its factorization.

11560221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75580 (or 75577 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 11560221 is about 3400.0324998447. The cubic root of 11560221 is about 226.1111847518. Note that the first 4 decimals are identical.

Adding to 11560221 its reverse (12206511), we get a palindrome (23766732).

It can be divided in two parts, 11560 and 221, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 11560221 in words is "eleven million, five hundred sixty thousand, two hundred twenty-one".