11042521 has 4 divisors (see below), whose sum is σ = 12620032. Its totient is φ = 9465012.

The previous prime is 11042513. The next prime is 11042531. The reversal of 11042521 is 12524011.

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: 12524011 = 1049 ⋅11939.

It is a cyclic number.

It is not a de Polignac number, because 11042521 - 2³ = 11042513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11042495 and 11042504.

It is not an unprimeable number, because it can be changed into a prime (11042501) 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, 788745 + ... + 788758.

It is an arithmetic number, because the mean of its divisors is an integer number (3155008).

Almost surely, 2^11042521 is an apocalyptic number.

It is an amenable number.

11042521 is a deficient number, since it is larger than the sum of its proper divisors (1577511).

11042521 is an equidigital number, since it uses as much as digits as its factorization.

11042521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577510.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 11042521 is about 3323.0288894320. The cubic root of 11042521 is about 222.6842038112.

Adding to 11042521 its reverse (12524011), we get a palindrome (23566532).

The spelling of 11042521 in words is "eleven million, forty-two thousand, five hundred twenty-one".