10365821 has 2 divisors, whose sum is σ = 10365822. Its totient is φ = 10365820.

The previous prime is 10365779. The next prime is 10365841. The reversal of 10365821 is 12856301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9703225 + 662596 = 3115^2 + 814^2 .

It is a cyclic number.

It is not a de Polignac number, because 10365821 - 2¹⁰ = 10364797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10365841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5182910 + 5182911.

It is an arithmetic number, because the mean of its divisors is an integer number (5182911).

Almost surely, 2^10365821 is an apocalyptic number.

It is an amenable number.

10365821 is a deficient number, since it is larger than the sum of its proper divisors (1).

10365821 is an equidigital number, since it uses as much as digits as its factorization.

10365821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 10365821 is about 3219.5995092558. The cubic root of 10365821 is about 218.0391941985.

The spelling of 10365821 in words is "ten million, three hundred sixty-five thousand, eight hundred twenty-one".