559621 has 4 divisors (see below), whose sum is σ = 561132. Its totient is φ = 558112.

The previous prime is 559597. The next prime is 559631. The reversal of 559621 is 126955.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 126955 = 5 ⋅25391.

It can be written as a sum of positive squares in 2 ways, for example, as 343396 + 216225 = 586^2 + 465^2 .

It is a cyclic number.

It is not a de Polignac number, because 559621 - 2¹¹ = 557573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 559621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (559631) 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, 225 + ... + 1081.

It is an arithmetic number, because the mean of its divisors is an integer number (140283).

2⁵⁵⁹⁶²¹ is an apocalyptic number.

It is an amenable number.

559621 is a deficient number, since it is larger than the sum of its proper divisors (1511).

559621 is an equidigital number, since it uses as much as digits as its factorization.

559621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510.

The product of its digits is 2700, while the sum is 28.

The square root of 559621 is about 748.0782044680. The cubic root of 559621 is about 82.4071069529.

The spelling of 559621 in words is "five hundred fifty-nine thousand, six hundred twenty-one".