656122 has 4 divisors (see below), whose sum is σ = 984186. Its totient is φ = 328060.

The previous prime is 656119. The next prime is 656129. The reversal of 656122 is 221656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 434281 + 221841 = 659^2 + 471^2 .

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 a junction number, because it is equal to n+sod(n) for n = 656093 and 656102.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 656122.

It is not an unprimeable number, because it can be changed into a prime (656129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164029 + ... + 164032.

2⁶⁵⁶¹²² is an apocalyptic number.

656122 is a deficient number, since it is larger than the sum of its proper divisors (328064).

656122 is a wasteful number, since it uses less digits than its factorization.

656122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328063.

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

The square root of 656122 is about 810.0135801331. The cubic root of 656122 is about 86.8950158321.

Subtracting from 656122 its sum of digits (22), we obtain a square (656100 = 810²).

Adding to 656122 its reverse (221656), we get a palindrome (877778).

The spelling of 656122 in words is "six hundred fifty-six thousand, one hundred twenty-two".