11750821 has 2 divisors, whose sum is σ = 11750822. Its totient is φ = 11750820.

The previous prime is 11750819. The next prime is 11750881. The reversal of 11750821 is 12805711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10150596 + 1600225 = 3186^2 + 1265^2 .

It is an emirp because it is prime and its reverse (12805711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11750821 - 2¹ = 11750819 is a prime.

Together with 11750819, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11750881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5875410 + 5875411.

It is an arithmetic number, because the mean of its divisors is an integer number (5875411).

Almost surely, 2^11750821 is an apocalyptic number.

It is an amenable number.

11750821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11750821 is an equidigital number, since it uses as much as digits as its factorization.

11750821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 11750821 is about 3427.9470532667. The cubic root of 11750821 is about 227.3470920333.

The spelling of 11750821 in words is "eleven million, seven hundred fifty thousand, eight hundred twenty-one".