1024021 has 2 divisors, whose sum is σ = 1024022. Its totient is φ = 1024020.

The previous prime is 1023991. The next prime is 1024031. The reversal of 1024021 is 1204201.

It is an a-pointer prime, because the next prime (1024031) can be obtained adding 1024021 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 680625 + 343396 = 825^2 + 586^2 .

It is a cyclic number.

It is not a de Polignac number, because 1024021 - 2¹¹ = 1021973 is a prime.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 1023989 and 1024007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1024031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512010 + 512011.

It is an arithmetic number, because the mean of its divisors is an integer number (512011).

2^1024021 is an apocalyptic number.

It is an amenable number.

1024021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1024021 is an equidigital number, since it uses as much as digits as its factorization.

1024021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1024021 is about 1011.9392274243. The cubic root of 1024021 is about 100.7943730062.

Adding to 1024021 its reverse (1204201), we get a palindrome (2228222).

The spelling of 1024021 in words is "one million, twenty-four thousand, twenty-one".