122605 has 16 divisors (see below), whose sum is σ = 175104. Its totient is φ = 80640.

The previous prime is 122599. The next prime is 122609. The reversal of 122605 is 506221.

It is a happy number.

It is not a de Polignac number, because 122605 - 2³ = 122597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1029 + ... + 1141.

It is an arithmetic number, because the mean of its divisors is an integer number (10944).

2¹²²⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

122605 is a deficient number, since it is larger than the sum of its proper divisors (52499).

122605 is a wasteful number, since it uses less digits than its factorization.

122605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 122605 is about 350.1499678709. The cubic root of 122605 is about 49.6786052008.

Multiplying 122605 by its product of nonzero digits (120), we get a triangular number (14712600 = T₅₄₂₄).

Adding to 122605 its reverse (506221), we get a palindrome (628826).

It can be divided in two parts, 122 and 605, that added together give a palindrome (727).

The spelling of 122605 in words is "one hundred twenty-two thousand, six hundred five".