11782321 has 4 divisors (see below), whose sum is σ = 11809600. Its totient is φ = 11755044.

The previous prime is 11782319. The next prime is 11782327. The reversal of 11782321 is 12328711.

It is a happy number.

11782321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 12328711 = 47 ⋅262313.

It is a cyclic number.

It is not a de Polignac number, because 11782321 - 2¹ = 11782319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11782327) 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, 12981 + ... + 13858.

It is an arithmetic number, because the mean of its divisors is an integer number (2952400).

Almost surely, 2^11782321 is an apocalyptic number.

It is an amenable number.

11782321 is a deficient number, since it is larger than the sum of its proper divisors (27279).

11782321 is an equidigital number, since it uses as much as digits as its factorization.

11782321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27278.

The product of its digits is 672, while the sum is 25.

The square root of 11782321 is about 3432.5385649691. The cubic root of 11782321 is about 227.5500578170.

The spelling of 11782321 in words is "eleven million, seven hundred eighty-two thousand, three hundred twenty-one".