561730 has 32 divisors (see below), whose sum is σ = 1134000. Its totient is φ = 198912.

The previous prime is 561713. The next prime is 561733. The reversal of 561730 is 37165.

It can be written as a sum of positive squares in 8 ways, for example, as 53361 + 508369 = 231^2 + 713^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3696 + ... + 3844.

2⁵⁶¹⁷³⁰ is an apocalyptic number.

561730 is an abundant number, since it is smaller than the sum of its proper divisors (572270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561730 is a wasteful number, since it uses less digits than its factorization.

561730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 561730 is about 749.4864908723. The cubic root of 561730 is about 82.5104975929.

Adding to 561730 its reverse (37165), we get a palindrome (598895).

The spelling of 561730 in words is "five hundred sixty-one thousand, seven hundred thirty".