8041821 has 4 divisors (see below), whose sum is σ = 10722432. Its totient is φ = 5361212.

The previous prime is 8041811. The next prime is 8041837. The reversal of 8041821 is 1281408.

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.

It is a cyclic number.

It is not a de Polignac number, because 8041821 - 2⁶ = 8041757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8041791 and 8041800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8041801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1340301 + ... + 1340306.

It is an arithmetic number, because the mean of its divisors is an integer number (2680608).

Almost surely, 2^8041821 is an apocalyptic number.

It is an amenable number.

8041821 is a deficient number, since it is larger than the sum of its proper divisors (2680611).

8041821 is a wasteful number, since it uses less digits than its factorization.

8041821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680610.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 8041821 is about 2835.8104661631. The cubic root of 8041821 is about 200.3479028006.

The spelling of 8041821 in words is "eight million, forty-one thousand, eight hundred twenty-one".