11320521 has 16 divisors (see below), whose sum is σ = 16225344. Its totient is φ = 6994944.

The previous prime is 11320511. The next prime is 11320537. The reversal of 11320521 is 12502311.

11320521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11320521 - 2⁵ = 11320489 is a prime.

It is a super-3 number, since 3×11320521³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 11320521.

It is not an unprimeable number, because it can be changed into a prime (11320511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1761 + ... + 5073.

It is an arithmetic number, because the mean of its divisors is an integer number (1014084).

Almost surely, 2^11320521 is an apocalyptic number.

It is an amenable number.

11320521 is a deficient number, since it is larger than the sum of its proper divisors (4904823).

11320521 is a wasteful number, since it uses less digits than its factorization.

11320521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 11320521 is about 3364.5981929496. The cubic root of 11320521 is about 224.5374596679.

Adding to 11320521 its reverse (12502311), we get a palindrome (23822832).

The spelling of 11320521 in words is "eleven million, three hundred twenty thousand, five hundred twenty-one".