11533921 has 8 divisors (see below), whose sum is σ = 13349120. Its totient is φ = 9760608.

The previous prime is 11533919. The next prime is 11533937. The reversal of 11533921 is 12933511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11533921 - 2¹ = 11533919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11533961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9876 + ... + 10981.

It is an arithmetic number, because the mean of its divisors is an integer number (1668640).

Almost surely, 2^11533921 is an apocalyptic number.

It is an amenable number.

11533921 is a deficient number, since it is larger than the sum of its proper divisors (1815199).

11533921 is an equidigital number, since it uses as much as digits as its factorization.

11533921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20943.

The product of its digits is 810, while the sum is 25.

The square root of 11533921 is about 3396.1626875048. The cubic root of 11533921 is about 225.9395836624.

The spelling of 11533921 in words is "eleven million, five hundred thirty-three thousand, nine hundred twenty-one".