561573 has 12 divisors (see below), whose sum is σ = 841568.
Its totient is φ = 374220.
The previous prime is 561559. The next prime is 561599. The reversal of 561573 is 375165.
It is not a de Polignac number, because 561573 - 29 = 561061 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (561553) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 913 + ... + 1398.
2561573 is an apocalyptic number.
It is an amenable number.
561573 is a deficient number, since it is larger than the sum of its proper divisors (279995).
561573 is an equidigital number, since it uses as much as digits as its factorization.
561573 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2326 (or 2314 counting only the distinct ones).
The product of its digits is 3150, while the sum is 27.
The square root of 561573 is about 749.3817451740.
The cubic root of 561573 is about 82.5028098217.
It can be divided in two parts, 56 and 1573, that multiplied together give a palindrome (88088).
The spelling of 561573 in words is "five hundred sixty-one thousand, five hundred seventy-three".