11273921 has 4 divisors (see below), whose sum is σ = 11282352. Its totient is φ = 11265492.

The previous prime is 11273903. The next prime is 11273929. The reversal of 11273921 is 12937211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11273921 - 2¹⁰ = 11272897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11273929) 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, 1715 + ... + 5048.

It is an arithmetic number, because the mean of its divisors is an integer number (2820588).

Almost surely, 2^11273921 is an apocalyptic number.

It is an amenable number.

11273921 is a deficient number, since it is larger than the sum of its proper divisors (8431).

11273921 is an equidigital number, since it uses as much as digits as its factorization.

11273921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8430.

The product of its digits is 756, while the sum is 26.

The square root of 11273921 is about 3357.6660048313. Note that the first 3 decimals coincide. The cubic root of 11273921 is about 224.2289392428.

The spelling of 11273921 in words is "eleven million, two hundred seventy-three thousand, nine hundred twenty-one".