561622 has 4 divisors (see below), whose sum is σ = 842436. Its totient is φ = 280810.

The previous prime is 561607. The next prime is 561667. The reversal of 561622 is 226165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 226165 = 5 ⋅45233.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 561593 and 561602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140404 + ... + 140407.

It is an arithmetic number, because the mean of its divisors is an integer number (210609).

2⁵⁶¹⁶²² is an apocalyptic number.

561622 is a deficient number, since it is larger than the sum of its proper divisors (280814).

561622 is a wasteful number, since it uses less digits than its factorization.

561622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280813.

The product of its digits is 720, while the sum is 22.

The square root of 561622 is about 749.4144380782. The cubic root of 561622 is about 82.5052093435.

Adding to 561622 its reverse (226165), we get a palindrome (787787).

The spelling of 561622 in words is "five hundred sixty-one thousand, six hundred twenty-two".