502021 has 12 divisors (see below), whose sum is σ = 572908. Its totient is φ = 437184.

The previous prime is 502013. The next prime is 502039. The reversal of 502021 is 120205.

It can be written as a sum of positive squares in 2 ways, for example, as 171396 + 330625 = 414^2 + 575^2 .

It is not a de Polignac number, because 502021 - 2³ = 502013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 501989 and 502007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (502001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6841 + ... + 6913.

2⁵⁰²⁰²¹ is an apocalyptic number.

It is an amenable number.

502021 is a deficient number, since it is larger than the sum of its proper divisors (70887).

502021 is a wasteful number, since it uses less digits than its factorization.

502021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 502021 is about 708.5344028345. The cubic root of 502021 is about 79.4768467576.

Adding to 502021 its reverse (120205), we get a palindrome (622226).

It can be divided in two parts, 5020 and 21, that added together give a square (5041 = 71²).

The spelling of 502021 in words is "five hundred two thousand, twenty-one".