11039921 has 4 divisors (see below), whose sum is σ = 11055600. Its totient is φ = 11024244.

The previous prime is 11039909. The next prime is 11039929. The reversal of 11039921 is 12993011.

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 an emirpimes, since its reverse is a distinct semiprime: 12993011 = 1433 ⋅9067.

It is a cyclic number.

It is not a de Polignac number, because 11039921 - 2¹⁰ = 11038897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11039929) 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 3 ways as a sum of consecutive naturals, for example, 6731 + ... + 8208.

It is an arithmetic number, because the mean of its divisors is an integer number (2763900).

Almost surely, 2^11039921 is an apocalyptic number.

It is an amenable number.

11039921 is a deficient number, since it is larger than the sum of its proper divisors (15679).

11039921 is an equidigital number, since it uses as much as digits as its factorization.

11039921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15678.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 11039921 is about 3322.6376570430. The cubic root of 11039921 is about 222.6667251824. Note that the first 3 decimals are identical.

The spelling of 11039921 in words is "eleven million, thirty-nine thousand, nine hundred twenty-one".