561786 has 16 divisors (see below), whose sum is σ = 1135200. Its totient is φ = 185328.

The previous prime is 561767. The next prime is 561787. The reversal of 561786 is 687165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225 + ... + 1083.

It is an arithmetic number, because the mean of its divisors is an integer number (70950).

2⁵⁶¹⁷⁸⁶ is an apocalyptic number.

561786 is an abundant number, since it is smaller than the sum of its proper divisors (573414).

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

561786 is a wasteful number, since it uses less digits than its factorization.

561786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973.

The product of its digits is 10080, while the sum is 33.

The square root of 561786 is about 749.5238488534. The cubic root of 561786 is about 82.5132393812.

The spelling of 561786 in words is "five hundred sixty-one thousand, seven hundred eighty-six".