4024021 has 2 divisors, whose sum is σ = 4024022. Its totient is φ = 4024020.

The previous prime is 4024003. The next prime is 4024037. The reversal of 4024021 is 1204204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3651921 + 372100 = 1911^2 + 610^2 .

It is a cyclic number.

It is not a de Polignac number, because 4024021 - 2¹¹ = 4021973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4023992 and 4024010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4024001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2012010 + 2012011.

It is an arithmetic number, because the mean of its divisors is an integer number (2012011).

Almost surely, 2^4024021 is an apocalyptic number.

It is an amenable number.

4024021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4024021 is an equidigital number, since it uses as much as digits as its factorization.

4024021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 4024021 is about 2005.9962612129. The cubic root of 4024021 is about 159.0572292439.

Adding to 4024021 its reverse (1204204), we get a palindrome (5228225).

The spelling of 4024021 in words is "four million, twenty-four thousand, twenty-one".