11795821 has 4 divisors (see below), whose sum is σ = 11868352. Its totient is φ = 11723292.

The previous prime is 11795809. The next prime is 11795857. The reversal of 11795821 is 12859711.

It is a happy number.

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: 12859711 = 109 ⋅117979.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11795821 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 (11795801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36021 + ... + 36346.

It is an arithmetic number, because the mean of its divisors is an integer number (2967088).

Almost surely, 2^11795821 is an apocalyptic number.

It is an amenable number.

11795821 is a deficient number, since it is larger than the sum of its proper divisors (72531).

11795821 is an equidigital number, since it uses as much as digits as its factorization.

11795821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72530.

The product of its digits is 5040, while the sum is 34.

The square root of 11795821 is about 3434.5044766312. The cubic root of 11795821 is about 227.6369324170.

The spelling of 11795821 in words is "eleven million, seven hundred ninety-five thousand, eight hundred twenty-one".