561704 has 32 divisors (see below), whose sum is σ = 1239840. Its totient is φ = 235200.

The previous prime is 561703. The next prime is 561713. The reversal of 561704 is 407165.

It is a super-2 number, since 2×561704² = 631022767232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 561704.

It is not an unprimeable number, because it can be changed into a prime (561703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899 + ... + 1389.

It is an arithmetic number, because the mean of its divisors is an integer number (38745).

2⁵⁶¹⁷⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (619920).

561704 is an abundant number, since it is smaller than the sum of its proper divisors (678136).

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

561704 is a wasteful number, since it uses less digits than its factorization.

561704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 561704 is about 749.4691454623. The cubic root of 561704 is about 82.5092245578.

Adding to 561704 its reverse (407165), we get a palindrome (968869).

The spelling of 561704 in words is "five hundred sixty-one thousand, seven hundred four".