8284042421 has 4 divisors (see below), whose sum is σ = 8771339052. Its totient is φ = 7796745792.

The previous prime is 8284042391. The next prime is 8284042423. The reversal of 8284042421 is 1242404828.

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 7142616196 + 1141426225 = 84514^2 + 33785^2 .

It is a cyclic number.

It is not a de Polignac number, because 8284042421 - 2¹⁰ = 8284041397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8284042423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243648290 + ... + 243648323.

It is an arithmetic number, because the mean of its divisors is an integer number (2192834763).

Almost surely, 2^8284042421 is an apocalyptic number.

It is an amenable number.

8284042421 is a deficient number, since it is larger than the sum of its proper divisors (487296631).

8284042421 is a wasteful number, since it uses less digits than its factorization.

8284042421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487296630.

The product of its (nonzero) digits is 32768, while the sum is 35.

The square root of 8284042421 is about 91016.7150637728. The cubic root of 8284042421 is about 2023.3954608354.

The spelling of 8284042421 in words is "eight billion, two hundred eighty-four million, forty-two thousand, four hundred twenty-one".