561570 has 16 divisors (see below), whose sum is σ = 1347840. Its totient is φ = 149744.

The previous prime is 561559. The next prime is 561599. The reversal of 561570 is 75165.

It is a self number, because there is not a number n which added to its sum of digits gives 561570.

It is an unprimeable number.

561570 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9330 + ... + 9389.

It is an arithmetic number, because the mean of its divisors is an integer number (84240).

2⁵⁶¹⁵⁷⁰ is an apocalyptic number.

561570 is an abundant number, since it is smaller than the sum of its proper divisors (786270).

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

561570 is a wasteful number, since it uses less digits than its factorization.

561570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18729.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 561570 is about 749.3797435213. The cubic root of 561570 is about 82.5026629076.

The spelling of 561570 in words is "five hundred sixty-one thousand, five hundred seventy".