561849 has 8 divisors (see below), whose sum is σ = 788640. Its totient is φ = 354816.

The previous prime is 561839. The next prime is 561907. The reversal of 561849 is 948165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561849 - 2¹⁶ = 496313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (561809) 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, 4872 + ... + 4985.

It is an arithmetic number, because the mean of its divisors is an integer number (98580).

2⁵⁶¹⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

561849 is a deficient number, since it is larger than the sum of its proper divisors (226791).

561849 is a wasteful number, since it uses less digits than its factorization.

561849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9879.

The product of its digits is 8640, while the sum is 33.

The square root of 561849 is about 749.5658743566. The cubic root of 561849 is about 82.5163236754.

The spelling of 561849 in words is "five hundred sixty-one thousand, eight hundred forty-nine".