6224021 has 4 divisors (see below), whose sum is σ = 6260172. Its totient is φ = 6187872.

The previous prime is 6224017. The next prime is 6224033. The reversal of 6224021 is 1204226.

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 5880625 + 343396 = 2425^2 + 586^2 .

It is a cyclic number.

It is not a de Polignac number, because 6224021 - 2² = 6224017 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 (6224011) 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, 17816 + ... + 18161.

It is an arithmetic number, because the mean of its divisors is an integer number (1565043).

Almost surely, 2^6224021 is an apocalyptic number.

It is an amenable number.

6224021 is a deficient number, since it is larger than the sum of its proper divisors (36151).

6224021 is a wasteful number, since it uses less digits than its factorization.

6224021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36150.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 6224021 is about 2494.7987894818. The cubic root of 6224021 is about 183.9460006160.

Adding to 6224021 its reverse (1204226), we get a palindrome (7428247).

The spelling of 6224021 in words is "six million, two hundred twenty-four thousand, twenty-one".