8354821 has 4 divisors (see below), whose sum is σ = 8437644. Its totient is φ = 8272000.

The previous prime is 8354807. The next prime is 8354849. The reversal of 8354821 is 1284538.

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 4972900 + 3381921 = 2230^2 + 1839^2 .

It is a cyclic number.

It is not a de Polignac number, because 8354821 - 2⁵ = 8354789 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 (8351821) 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, 41260 + ... + 41461.

It is an arithmetic number, because the mean of its divisors is an integer number (2109411).

Almost surely, 2^8354821 is an apocalyptic number.

It is an amenable number.

8354821 is a deficient number, since it is larger than the sum of its proper divisors (82823).

8354821 is a wasteful number, since it uses less digits than its factorization.

8354821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82822.

The product of its digits is 7680, while the sum is 31.

The square root of 8354821 is about 2890.4707229100. The cubic root of 8354821 is about 202.9141733975.

The spelling of 8354821 in words is "eight million, three hundred fifty-four thousand, eight hundred twenty-one".