11576821 has 2 divisors, whose sum is σ = 11576822. Its totient is φ = 11576820.

The previous prime is 11576767. The next prime is 11576827. The reversal of 11576821 is 12867511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6002500 + 5574321 = 2450^2 + 2361^2 .

It is a cyclic number.

It is not a de Polignac number, because 11576821 - 2⁷ = 11576693 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11576827) 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, 5788410 + 5788411.

It is an arithmetic number, because the mean of its divisors is an integer number (5788411).

Almost surely, 2^11576821 is an apocalyptic number.

It is an amenable number.

11576821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11576821 is an equidigital number, since it uses as much as digits as its factorization.

11576821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 31.

The square root of 11576821 is about 3402.4727772607. The cubic root of 11576821 is about 226.2193617640.

The spelling of 11576821 in words is "eleven million, five hundred seventy-six thousand, eight hundred twenty-one".