8022421 has 6 divisors (see below), whose sum is σ = 8818166. Its totient is φ = 7293000.

The previous prime is 8022409. The next prime is 8022437. The reversal of 8022421 is 1242208.

It can be written as a sum of positive squares in only one way, i.e., 5336100 + 2686321 = 2310^2 + 1639^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8022421 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 (8022491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33030 + ... + 33271.

Almost surely, 2^8022421 is an apocalyptic number.

It is an amenable number.

8022421 is a deficient number, since it is larger than the sum of its proper divisors (795745).

8022421 is a wasteful number, since it uses less digits than its factorization.

8022421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66323 (or 66312 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 8022421 is about 2832.3878618579. The cubic root of 8022421 is about 200.1866673889.

Adding to 8022421 its reverse (1242208), we get a palindrome (9264629).

It can be divided in two parts, 802 and 2421, that added together give a palindrome (3223).

The spelling of 8022421 in words is "eight million, twenty-two thousand, four hundred twenty-one".