561126 has 16 divisors (see below), whose sum is σ = 1150128. Its totient is φ = 182400.

The previous prime is 561109. The next prime is 561161. The reversal of 561126 is 621165.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

561126 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 895 + ... + 1386.

It is an arithmetic number, because the mean of its divisors is an integer number (71883).

2⁵⁶¹¹²⁶ is an apocalyptic number.

561126 is an abundant number, since it is smaller than the sum of its proper divisors (589002).

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

561126 is a wasteful number, since it uses less digits than its factorization.

561126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2327.

The product of its digits is 360, while the sum is 21.

The square root of 561126 is about 749.0834399451. The cubic root of 561126 is about 82.4809138585.

The spelling of 561126 in words is "five hundred sixty-one thousand, one hundred twenty-six".