561143 has 8 divisors (see below), whose sum is σ = 618240. Its totient is φ = 505080.

The previous prime is 561109. The next prime is 561161. The reversal of 561143 is 341165.

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

It is a cyclic number.

It is not a de Polignac number, because 561143 - 2⁶ = 561079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1346 + ... + 1712.

It is an arithmetic number, because the mean of its divisors is an integer number (77280).

2⁵⁶¹¹⁴³ is an apocalyptic number.

561143 is a deficient number, since it is larger than the sum of its proper divisors (57097).

561143 is a wasteful number, since it uses less digits than its factorization.

561143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517.

The product of its digits is 360, while the sum is 20.

The square root of 561143 is about 749.0947870597. The cubic root of 561143 is about 82.4817468035.

The spelling of 561143 in words is "five hundred sixty-one thousand, one hundred forty-three".