11321391 has 4 divisors (see below), whose sum is σ = 15095192. Its totient is φ = 7547592.

The previous prime is 11321389. The next prime is 11321399. The reversal of 11321391 is 19312311.

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

It is not a de Polignac number, because 11321391 - 2¹ = 11321389 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 (11321399) 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, 1886896 + ... + 1886901.

It is an arithmetic number, because the mean of its divisors is an integer number (3773798).

Almost surely, 2^11321391 is an apocalyptic number.

11321391 is a deficient number, since it is larger than the sum of its proper divisors (3773801).

11321391 is an equidigital number, since it uses as much as digits as its factorization.

11321391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3773800.

The product of its digits is 162, while the sum is 21.

The square root of 11321391 is about 3364.7274778205. The cubic root of 11321391 is about 224.5432115405.

The spelling of 11321391 in words is "eleven million, three hundred twenty-one thousand, three hundred ninety-one".