10043821 has 4 divisors (see below), whose sum is σ = 10634652. Its totient is φ = 9452992.

The previous prime is 10043809. The next prime is 10043843. The reversal of 10043821 is 12834001.

10043821 is digitally balanced in base 3, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 5225796 + 4818025 = 2286^2 + 2195^2 .

It is a cyclic number.

It is not a de Polignac number, because 10043821 - 2¹⁹ = 9519533 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 (10043321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295390 + ... + 295423.

It is an arithmetic number, because the mean of its divisors is an integer number (2658663).

Almost surely, 2^10043821 is an apocalyptic number.

It is an amenable number.

10043821 is a deficient number, since it is larger than the sum of its proper divisors (590831).

10043821 is an equidigital number, since it uses as much as digits as its factorization.

10043821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590830.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 10043821 is about 3169.1987946483. The cubic root of 10043821 is about 215.7577087144.

Adding to 10043821 its reverse (12834001), we get a palindrome (22877822).

The spelling of 10043821 in words is "ten million, forty-three thousand, eight hundred twenty-one".