11045521 has 2 divisors, whose sum is σ = 11045522. Its totient is φ = 11045520.

The previous prime is 11045513. The next prime is 11045561. The reversal of 11045521 is 12554011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9859600 + 1185921 = 3140^2 + 1089^2 .

It is an emirp because it is prime and its reverse (12554011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11045521 - 2³ = 11045513 is a prime.

It is a super-2 number, since 2×11045521² = 244007068322882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11045561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5522760 + 5522761.

It is an arithmetic number, because the mean of its divisors is an integer number (5522761).

Almost surely, 2^11045521 is an apocalyptic number.

It is an amenable number.

11045521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11045521 is an equidigital number, since it uses as much as digits as its factorization.

11045521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 11045521 is about 3323.4802541914. The cubic root of 11045521 is about 222.7043680509.

Adding to 11045521 its reverse (12554011), we get a palindrome (23599532).

The spelling of 11045521 in words is "eleven million, forty-five thousand, five hundred twenty-one".