622161 has 10 divisors (see below), whose sum is σ = 929522. Its totient is φ = 414720.

The previous prime is 622159. The next prime is 622177. The reversal of 622161 is 161226.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 571536 + 50625 = 756^2 + 225^2 .

It is not a de Polignac number, because 622161 - 2¹ = 622159 is a prime.

It is a Duffinian number.

622161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (622151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3760 + ... + 3921.

2⁶²²¹⁶¹ is an apocalyptic number.

It is an amenable number.

622161 is a deficient number, since it is larger than the sum of its proper divisors (307361).

622161 is an equidigital number, since it uses as much as digits as its factorization.

622161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7693 (or 7684 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 622161 is about 788.7718301258. The cubic root of 622161 is about 85.3691442442.

Adding to 622161 its reverse (161226), we get a palindrome (783387).

The spelling of 622161 in words is "six hundred twenty-two thousand, one hundred sixty-one".