561632 has 12 divisors (see below), whose sum is σ = 1105776. Its totient is φ = 280800.

The previous prime is 561607. The next prime is 561667. The reversal of 561632 is 236165.

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

It is a junction number, because it is equal to n+sod(n) for n = 561598 and 561607.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 8744 + ... + 8807.

It is an arithmetic number, because the mean of its divisors is an integer number (92148).

2⁵⁶¹⁶³² is an apocalyptic number.

It is an amenable number.

561632 is a deficient number, since it is larger than the sum of its proper divisors (544144).

561632 is a wasteful number, since it uses less digits than its factorization.

561632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17561 (or 17553 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 561632 is about 749.4211099242. The cubic root of 561632 is about 82.5056990247.

Adding to 561632 its reverse (236165), we get a palindrome (797797).

It can be divided in two parts, 56163 and 2, that added together give a palindrome (56165).

The spelling of 561632 in words is "five hundred sixty-one thousand, six hundred thirty-two".