8235821 has 4 divisors (see below), whose sum is σ = 8984544. Its totient is φ = 7487100.

The previous prime is 8235809. The next prime is 8235827. The reversal of 8235821 is 1285328.

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 8235821 - 2⁶ = 8235757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8235827) 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, 374345 + ... + 374366.

It is an arithmetic number, because the mean of its divisors is an integer number (2246136).

Almost surely, 2^8235821 is an apocalyptic number.

It is an amenable number.

8235821 is a deficient number, since it is larger than the sum of its proper divisors (748723).

8235821 is a wasteful number, since it uses less digits than its factorization.

8235821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748722.

The product of its digits is 3840, while the sum is 29.

The square root of 8235821 is about 2869.8120147494. The cubic root of 8235821 is about 201.9461755754.

The spelling of 8235821 in words is "eight million, two hundred thirty-five thousand, eight hundred twenty-one".