11355521 has 4 divisors (see below), whose sum is σ = 11953200. Its totient is φ = 10757844.

The previous prime is 11355493. The next prime is 11355563. The reversal of 11355521 is 12555311.

It is a happy number.

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 11355521 - 2⁶ = 11355457 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 (11355571) 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, 298811 + ... + 298848.

It is an arithmetic number, because the mean of its divisors is an integer number (2988300).

Almost surely, 2^11355521 is an apocalyptic number.

It is an amenable number.

11355521 is a deficient number, since it is larger than the sum of its proper divisors (597679).

11355521 is an equidigital number, since it uses as much as digits as its factorization.

11355521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597678.

The product of its digits is 750, while the sum is 23.

The square root of 11355521 is about 3369.7953943823. The cubic root of 11355521 is about 224.7686247018.

The spelling of 11355521 in words is "eleven million, three hundred fifty-five thousand, five hundred twenty-one".