122621 has 4 divisors (see below), whose sum is σ = 129852. Its totient is φ = 115392.

The previous prime is 122611. The next prime is 122651. The reversal of 122621 is 126221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126221 = 113 ⋅1117.

It can be written as a sum of positive squares in 2 ways, for example, as 98596 + 24025 = 314^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 122621 - 2⁶ = 122557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122596 and 122605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3590 + ... + 3623.

It is an arithmetic number, because the mean of its divisors is an integer number (32463).

2¹²²⁶²¹ is an apocalyptic number.

It is an amenable number.

122621 is a deficient number, since it is larger than the sum of its proper divisors (7231).

122621 is an equidigital number, since it uses as much as digits as its factorization.

122621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7230.

The product of its digits is 48, while the sum is 14.

The square root of 122621 is about 350.1728144788. The cubic root of 122621 is about 49.6807661325.

Adding to 122621 its reverse (126221), we get a palindrome (248842).

Subtracting 122621 from its reverse (126221), we obtain a square (3600 = 60²).

It can be divided in two parts, 1 and 22621, that added together give a palindrome (22622).

The spelling of 122621 in words is "one hundred twenty-two thousand, six hundred twenty-one".