11286921 has 8 divisors (see below), whose sum is σ = 15230880. Its totient is φ = 7433792.

The previous prime is 11286917. The next prime is 11286937. The reversal of 11286921 is 12968211.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11286921 - 2² = 11286917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11286901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22416 + ... + 22913.

It is an arithmetic number, because the mean of its divisors is an integer number (1903860).

Almost surely, 2^11286921 is an apocalyptic number.

It is an amenable number.

11286921 is a deficient number, since it is larger than the sum of its proper divisors (3943959).

11286921 is an equidigital number, since it uses as much as digits as its factorization.

11286921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45415.

The product of its digits is 1728, while the sum is 30.

The square root of 11286921 is about 3359.6013156326. The cubic root of 11286921 is about 224.3150925431.

The spelling of 11286921 in words is "eleven million, two hundred eighty-six thousand, nine hundred twenty-one".