11043521 has 4 divisors (see below), whose sum is σ = 11084544. Its totient is φ = 11002500.

The previous prime is 11043517. The next prime is 11043551. The reversal of 11043521 is 12534011.

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.

It is a cyclic number.

It is not a de Polignac number, because 11043521 - 2² = 11043517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11043521.

It is not an unprimeable number, because it can be changed into a prime (11043511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20105 + ... + 20646.

It is an arithmetic number, because the mean of its divisors is an integer number (2771136).

Almost surely, 2^11043521 is an apocalyptic number.

It is an amenable number.

11043521 is a deficient number, since it is larger than the sum of its proper divisors (41023).

11043521 is an equidigital number, since it uses as much as digits as its factorization.

11043521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41022.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 11043521 is about 3323.1793511636. The cubic root of 11043521 is about 222.6909256301.

Adding to 11043521 its reverse (12534011), we get a palindrome (23577532).

The spelling of 11043521 in words is "eleven million, forty-three thousand, five hundred twenty-one".