605561 has 4 divisors (see below), whose sum is σ = 660624. Its totient is φ = 550500.

The previous prime is 605551. The next prime is 605573. The reversal of 605561 is 165506.

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 605561 - 2⁶ = 605497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (605531) 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, 27515 + ... + 27536.

It is an arithmetic number, because the mean of its divisors is an integer number (165156).

2⁶⁰⁵⁵⁶¹ is an apocalyptic number.

It is an amenable number.

605561 is a deficient number, since it is larger than the sum of its proper divisors (55063).

605561 is a wasteful number, since it uses less digits than its factorization.

605561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55062.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 605561 is about 778.1780002030. The cubic root of 605561 is about 84.6030394577.

It can be divided in two parts, 6055 and 61, that added together give a palindrome (6116).

The spelling of 605561 in words is "six hundred five thousand, five hundred sixty-one".