561867 has 16 divisors (see below), whose sum is σ = 829440. Its totient is φ = 336512.

The previous prime is 561839. The next prime is 561907. The reversal of 561867 is 768165.

It is a cyclic number.

It is not a de Polignac number, because 561867 - 2¹⁴ = 545483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 934 + ... + 1412.

It is an arithmetic number, because the mean of its divisors is an integer number (51840).

2⁵⁶¹⁸⁶⁷ is an apocalyptic number.

561867 is a deficient number, since it is larger than the sum of its proper divisors (267573).

561867 is a wasteful number, since it uses less digits than its factorization.

561867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522.

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

The square root of 561867 is about 749.5778812105. The cubic root of 561867 is about 82.5172048599.

The spelling of 561867 in words is "five hundred sixty-one thousand, eight hundred sixty-seven".