561610 has 32 divisors (see below), whose sum is σ = 1181952. Its totient is φ = 188160.

The previous prime is 561607. The next prime is 561667. The reversal of 561610 is 16165.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4914 + ... + 5026.

It is an arithmetic number, because the mean of its divisors is an integer number (36936).

2⁵⁶¹⁶¹⁰ is an apocalyptic number.

561610 is an abundant number, since it is smaller than the sum of its proper divisors (620342).

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

561610 is a wasteful number, since it uses less digits than its factorization.

561610 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 180, while the sum is 19.

The square root of 561610 is about 749.4064317845. The cubic root of 561610 is about 82.5046217184.

Adding to 561610 its reverse (16165), we get a palindrome (577775).

The spelling of 561610 in words is "five hundred sixty-one thousand, six hundred ten".