530661 has 4 divisors (see below), whose sum is σ = 707552. Its totient is φ = 353772.

The previous prime is 530659. The next prime is 530669. The reversal of 530661 is 166035.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 530661 - 2¹ = 530659 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (530669) 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, 88441 + ... + 88446.

It is an arithmetic number, because the mean of its divisors is an integer number (176888).

2⁵³⁰⁶⁶¹ is an apocalyptic number.

It is an amenable number.

530661 is a deficient number, since it is larger than the sum of its proper divisors (176891).

530661 is a wasteful number, since it uses less digits than its factorization.

530661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176890.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 530661 is about 728.4648241336. The cubic root of 530661 is about 80.9603524912.

Adding to 530661 its reverse (166035), we get a palindrome (696696).

The spelling of 530661 in words is "five hundred thirty thousand, six hundred sixty-one".