561982 has 16 divisors (see below), whose sum is σ = 927360. Its totient is φ = 254232.

The previous prime is 561973. The next prime is 561983. The reversal of 561982 is 289165.

561982 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561983) 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, 553 + ... + 1195.

It is an arithmetic number, because the mean of its divisors is an integer number (57960).

2⁵⁶¹⁹⁸² is an apocalyptic number.

561982 is a deficient number, since it is larger than the sum of its proper divisors (365378).

561982 is a wasteful number, since it uses less digits than its factorization.

561982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687.

The product of its digits is 4320, while the sum is 31.

The square root of 561982 is about 749.6545871266. The cubic root of 561982 is about 82.5228342059.

The spelling of 561982 in words is "five hundred sixty-one thousand, nine hundred eighty-two".