561006 has 20 divisors (see below), whose sum is σ = 1257432. Its totient is φ = 186948.

The previous prime is 560977. The next prime is 561019. The reversal of 561006 is 600165.

561006 = 373² + 374² + ... + 376².

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 561006.

It is a congruent number.

It is an unprimeable 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 9 ways as a sum of consecutive naturals, for example, 1570 + ... + 1893.

2⁵⁶¹⁰⁰⁶ is an apocalyptic number.

561006 is an abundant number, since it is smaller than the sum of its proper divisors (696426).

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

561006 is a wasteful number, since it uses less digits than its factorization.

561006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477 (or 3468 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 561006 is about 749.0033377763. The cubic root of 561006 is about 82.4750337678.

The spelling of 561006 in words is "five hundred sixty-one thousand, six".