11121839 has 4 divisors (see below), whose sum is σ = 11480640. Its totient is φ = 10763040.

The previous prime is 11121823. The next prime is 11121841. The reversal of 11121839 is 93812111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11121839 - 2⁴ = 11121823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121139) 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, 179354 + ... + 179415.

It is an arithmetic number, because the mean of its divisors is an integer number (2870160).

Almost surely, 2^11121839 is an apocalyptic number.

11121839 is a deficient number, since it is larger than the sum of its proper divisors (358801).

11121839 is an equidigital number, since it uses as much as digits as its factorization.

11121839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358800.

The product of its digits is 432, while the sum is 26.

The square root of 11121839 is about 3334.9421284334. The cubic root of 11121839 is about 223.2161096165.

The spelling of 11121839 in words is "eleven million, one hundred twenty-one thousand, eight hundred thirty-nine".