11521441 has 4 divisors (see below), whose sum is σ = 11554992. Its totient is φ = 11487892.

The previous prime is 11521421. The next prime is 11521453. The reversal of 11521441 is 14412511.

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 11521441 - 2¹⁹ = 10997153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11521421) 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, 16255 + ... + 16948.

It is an arithmetic number, because the mean of its divisors is an integer number (2888748).

Almost surely, 2^11521441 is an apocalyptic number.

It is an amenable number.

11521441 is a deficient number, since it is larger than the sum of its proper divisors (33551).

11521441 is an equidigital number, since it uses as much as digits as its factorization.

11521441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33550.

The product of its digits is 160, while the sum is 19.

The square root of 11521441 is about 3394.3248224058. The cubic root of 11521441 is about 225.8580634341.

Adding to 11521441 its reverse (14412511), we get a palindrome (25933952).

The spelling of 11521441 in words is "eleven million, five hundred twenty-one thousand, four hundred forty-one".