561436 has 12 divisors (see below), whose sum is σ = 993328. Its totient is φ = 277632.

The previous prime is 561419. The next prime is 561439. The reversal of 561436 is 634165.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 561436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561439) by changing a digit.

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, 336 + ... + 1111.

2⁵⁶¹⁴³⁶ is an apocalyptic number.

It is an amenable number.

561436 is a deficient number, since it is larger than the sum of its proper divisors (431892).

561436 is a wasteful number, since it uses less digits than its factorization.

561436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548 (or 1546 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 561436 is about 749.2903309132. The cubic root of 561436 is about 82.4961002136.

The spelling of 561436 in words is "five hundred sixty-one thousand, four hundred thirty-six".