610561 has 4 divisors (see below), whose sum is σ = 697792. Its totient is φ = 523332.

The previous prime is 610559. The next prime is 610567. The reversal of 610561 is 165016.

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 a cyclic number.

It is not a de Polignac number, because 610561 - 2¹ = 610559 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (610567) 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, 43605 + ... + 43618.

It is an arithmetic number, because the mean of its divisors is an integer number (174448).

2⁶¹⁰⁵⁶¹ is an apocalyptic number.

It is an amenable number.

610561 is a deficient number, since it is larger than the sum of its proper divisors (87231).

610561 is an equidigital number, since it uses as much as digits as its factorization.

610561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87230.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 610561 is about 781.3840285033. The cubic root of 610561 is about 84.8352518234.

Adding to 610561 its reverse (165016), we get a palindrome (775577).

The spelling of 610561 in words is "six hundred ten thousand, five hundred sixty-one".