11475521 has 4 divisors (see below), whose sum is σ = 11485632. Its totient is φ = 11465412.

The previous prime is 11475509. The next prime is 11475523. The reversal of 11475521 is 12557411.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12557411 = 3137 ⋅4003.

It is a cyclic number.

It is not a de Polignac number, because 11475521 - 2¹⁴ = 11459137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11475523) 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 3 ways as a sum of consecutive naturals, for example, 3101 + ... + 5706.

It is an arithmetic number, because the mean of its divisors is an integer number (2871408).

Almost surely, 2^11475521 is an apocalyptic number.

It is an amenable number.

11475521 is a deficient number, since it is larger than the sum of its proper divisors (10111).

11475521 is an equidigital number, since it uses as much as digits as its factorization.

11475521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10110.

The product of its digits is 1400, while the sum is 26.

The square root of 11475521 is about 3387.5538372106. The cubic root of 11475521 is about 225.5576029951.

The spelling of 11475521 in words is "eleven million, four hundred seventy-five thousand, five hundred twenty-one".