561508 has 12 divisors (see below), whose sum is σ = 988540. Its totient is φ = 279072.

The previous prime is 561461. The next prime is 561521. The reversal of 561508 is 805165.

It can be written as a sum of positive squares in 2 ways, for example, as 222784 + 338724 = 472^2 + 582^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610 + ... + 1222.

2⁵⁶¹⁵⁰⁸ is an apocalyptic number.

It is an amenable number.

561508 is a deficient number, since it is larger than the sum of its proper divisors (427032).

561508 is a wasteful number, since it uses less digits than its factorization.

561508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 561508 is about 749.3383748348. The cubic root of 561508 is about 82.4996265670.

It can be divided in two parts, 56 and 1508, that multiplied together give a palindrome (84448).

The spelling of 561508 in words is "five hundred sixty-one thousand, five hundred eight".