11530321 has 16 divisors (see below), whose sum is σ = 13559040. Its totient is φ = 9691920.

The previous prime is 11530319. The next prime is 11530327. The reversal of 11530321 is 12303511.

11530321 = 123² + 124² + ... + 331².

It is a cyclic number.

It is not a de Polignac number, because 11530321 - 2¹ = 11530319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11530295 and 11530304.

It is not an unprimeable number, because it can be changed into a prime (11530327) 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, 8346 + ... + 9628.

It is an arithmetic number, because the mean of its divisors is an integer number (847440).

Almost surely, 2^11530321 is an apocalyptic number.

11530321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11530321 is a deficient number, since it is larger than the sum of its proper divisors (2028719).

11530321 is a wasteful number, since it uses less digits than its factorization.

11530321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 11530321 is about 3395.6326361961. The cubic root of 11530321 is about 225.9160742493.

Adding to 11530321 its reverse (12303511), we get a palindrome (23833832).

The spelling of 11530321 in words is "eleven million, five hundred thirty thousand, three hundred twenty-one".