8284421 has 4 divisors (see below), whose sum is σ = 8300844. Its totient is φ = 8268000.

The previous prime is 8284417. The next prime is 8284427. The reversal of 8284421 is 1244828.

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 6076225 + 2208196 = 2465^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 8284421 - 2² = 8284417 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 (8284427) 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, 7430 + ... + 8471.

It is an arithmetic number, because the mean of its divisors is an integer number (2075211).

Almost surely, 2^8284421 is an apocalyptic number.

It is an amenable number.

8284421 is a deficient number, since it is larger than the sum of its proper divisors (16423).

8284421 is a wasteful number, since it uses less digits than its factorization.

8284421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16422.

The product of its digits is 4096, while the sum is 29.

The square root of 8284421 is about 2878.2670133259. The cubic root of 8284421 is about 202.3426283282.

The spelling of 8284421 in words is "eight million, two hundred eighty-four thousand, four hundred twenty-one".