4472021 has 2 divisors, whose sum is σ = 4472022. Its totient is φ = 4472020.

The previous prime is 4471997. The next prime is 4472081. The reversal of 4472021 is 1202744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4468996 + 3025 = 2114^2 + 55^2 .

It is a cyclic number.

It is not a de Polignac number, because 4472021 - 2¹⁰ = 4470997 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4471984 and 4472002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4472081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2236010 + 2236011.

It is an arithmetic number, because the mean of its divisors is an integer number (2236011).

Almost surely, 2^4472021 is an apocalyptic number.

It is an amenable number.

4472021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4472021 is an equidigital number, since it uses as much as digits as its factorization.

4472021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 4472021 is about 2114.7153472749. The cubic root of 4472021 is about 164.7534855726.

Adding to 4472021 its reverse (1202744), we get a palindrome (5674765).

The spelling of 4472021 in words is "four million, four hundred seventy-two thousand, twenty-one".