530021 has 2 divisors, whose sum is σ = 530022. Its totient is φ = 530020.

The previous prime is 530017. The next prime is 530027. The reversal of 530021 is 120035.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 504100 + 25921 = 710^2 + 161^2 .

It is a cyclic number.

It is not a de Polignac number, because 530021 - 2² = 530017 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 529984 and 530011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (530027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265010 + 265011.

It is an arithmetic number, because the mean of its divisors is an integer number (265011).

2⁵³⁰⁰²¹ is an apocalyptic number.

It is an amenable number.

530021 is a deficient number, since it is larger than the sum of its proper divisors (1).

530021 is an equidigital number, since it uses as much as digits as its factorization.

530021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 530021 is about 728.0254116444. The cubic root of 530021 is about 80.9277921751.

Adding to 530021 its reverse (120035), we get a palindrome (650056).

The spelling of 530021 in words is "five hundred thirty thousand, twenty-one".