561424 has 10 divisors (see below), whose sum is σ = 1087790. Its totient is φ = 280704.

The previous prime is 561419. The next prime is 561439. The reversal of 561424 is 424165.

It can be written as a sum of positive squares in only one way, i.e., 535824 + 25600 = 732^2 + 160^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 561395 and 561404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17529 + ... + 17560.

It is an arithmetic number, because the mean of its divisors is an integer number (108779).

2⁵⁶¹⁴²⁴ is an apocalyptic number.

It is an amenable number.

561424 is a deficient number, since it is larger than the sum of its proper divisors (526366).

561424 is a wasteful number, since it uses less digits than its factorization.

561424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35097 (or 35091 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 561424 is about 749.2823232934. The cubic root of 561424 is about 82.4955124587.

Adding to 561424 its reverse (424165), we get a palindrome (985589).

The spelling of 561424 in words is "five hundred sixty-one thousand, four hundred twenty-four".