11524321 has 4 divisors (see below), whose sum is σ = 11805444. Its totient is φ = 11243200.

The previous prime is 11524319. The next prime is 11524349. The reversal of 11524321 is 12342511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2739025 + 8785296 = 1655^2 + 2964^2 .

It is a cyclic number.

It is not a de Polignac number, because 11524321 - 2¹ = 11524319 is a prime.

It is a super-2 number, since 2×11524321² = 265619949022082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11524021) 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, 140500 + ... + 140581.

It is an arithmetic number, because the mean of its divisors is an integer number (2951361).

Almost surely, 2^11524321 is an apocalyptic number.

It is an amenable number.

11524321 is a deficient number, since it is larger than the sum of its proper divisors (281123).

11524321 is an equidigital number, since it uses as much as digits as its factorization.

11524321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281122.

The product of its digits is 240, while the sum is 19.

The square root of 11524321 is about 3394.7490334338. The cubic root of 11524321 is about 225.8768810175.

Adding to 11524321 its reverse (12342511), we get a palindrome (23866832).

The spelling of 11524321 in words is "eleven million, five hundred twenty-four thousand, three hundred twenty-one".