530545021 has 4 divisors (see below), whose sum is σ = 535798044. Its totient is φ = 525292000.

The previous prime is 530545009. The next prime is 530545033. The reversal of 530545021 is 120545035.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (530545009) and next prime (530545033).

It can be written as a sum of positive squares in 2 ways, for example, as 436183225 + 94361796 = 20885^2 + 9714^2 .

It is a cyclic number.

It is not a de Polignac number, because 530545021 - 2²¹ = 528447869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (530545621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2626360 + ... + 2626561.

It is an arithmetic number, because the mean of its divisors is an integer number (133949511).

Almost surely, 2^530545021 is an apocalyptic number.

It is an amenable number.

530545021 is a deficient number, since it is larger than the sum of its proper divisors (5253023).

530545021 is a wasteful number, since it uses less digits than its factorization.

530545021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5253022.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 530545021 is about 23033.5629245673. The cubic root of 530545021 is about 809.5445394527.

The spelling of 530545021 in words is "five hundred thirty million, five hundred forty-five thousand, twenty-one".