8234821 has 4 divisors (see below), whose sum is σ = 9411232. Its totient is φ = 7058412.

The previous prime is 8234813. The next prime is 8234839. The reversal of 8234821 is 1284328.

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 8234821 - 2³ = 8234813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8234821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8234321) 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, 588195 + ... + 588208.

It is an arithmetic number, because the mean of its divisors is an integer number (2352808).

Almost surely, 2^8234821 is an apocalyptic number.

It is an amenable number.

8234821 is a deficient number, since it is larger than the sum of its proper divisors (1176411).

8234821 is a wasteful number, since it uses less digits than its factorization.

8234821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176410.

The product of its digits is 3072, while the sum is 28.

The square root of 8234821 is about 2869.6377820206. The cubic root of 8234821 is about 201.9380017556.

It can be divided in two parts, 82348 and 21, that added together give a square (82369 = 287²).

The spelling of 8234821 in words is "eight million, two hundred thirty-four thousand, eight hundred twenty-one".