11533421 has 4 divisors (see below), whose sum is σ = 11663100. Its totient is φ = 11403744.

The previous prime is 11533393. The next prime is 11533433. The reversal of 11533421 is 12433511.

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 2449225 + 9084196 = 1565^2 + 3014^2 .

It is a cyclic number.

It is not a de Polignac number, because 11533421 - 2¹⁰ = 11532397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11533393 and 11533402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11533451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64706 + ... + 64883.

It is an arithmetic number, because the mean of its divisors is an integer number (2915775).

Almost surely, 2^11533421 is an apocalyptic number.

It is an amenable number.

11533421 is a deficient number, since it is larger than the sum of its proper divisors (129679).

11533421 is an equidigital number, since it uses as much as digits as its factorization.

11533421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129678.

The product of its digits is 360, while the sum is 20.

The square root of 11533421 is about 3396.0890742146. The cubic root of 11533421 is about 225.9363187587.

Adding to 11533421 its reverse (12433511), we get a palindrome (23966932).

The spelling of 11533421 in words is "eleven million, five hundred thirty-three thousand, four hundred twenty-one".