122658 has 8 divisors (see below), whose sum is σ = 245328. Its totient is φ = 40884.

The previous prime is 122653. The next prime is 122663. The reversal of 122658 is 856221.

It is an interprime number because it is at equal distance from previous prime (122653) and next prime (122663).

It is a sphenic number, since it is the product of 3 distinct primes.

122658 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122651) 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, 10216 + ... + 10227.

It is an arithmetic number, because the mean of its divisors is an integer number (30666).

2¹²²⁶⁵⁸ is an apocalyptic number.

122658 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122658 is a wasteful number, since it uses less digits than its factorization.

122658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20448.

The product of its digits is 960, while the sum is 24.

The square root of 122658 is about 350.2256415513. The cubic root of 122658 is about 49.6857625673.

Adding to 122658 its reverse (856221), we get a palindrome (978879).

It can be divided in two parts, 122 and 658, that added together give a triangular number (780 = T₃₉).

The spelling of 122658 in words is "one hundred twenty-two thousand, six hundred fifty-eight".