11538921 has 8 divisors (see below), whose sum is σ = 15743200. Its totient is φ = 7513632.

The previous prime is 11538911. The next prime is 11538953. The reversal of 11538921 is 12983511.

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

It is not a de Polignac number, because 11538921 - 2⁵ = 11538889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11538911) 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, 44596 + ... + 44853.

It is an arithmetic number, because the mean of its divisors is an integer number (1967900).

Almost surely, 2^11538921 is an apocalyptic number.

It is an amenable number.

11538921 is a deficient number, since it is larger than the sum of its proper divisors (4204279).

11538921 is an equidigital number, since it uses as much as digits as its factorization.

11538921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89495.

The product of its digits is 2160, while the sum is 30.

The square root of 11538921 is about 3396.8987326678. The cubic root of 11538921 is about 225.9722275111.

The spelling of 11538921 in words is "eleven million, five hundred thirty-eight thousand, nine hundred twenty-one".