172000122 has 64 divisors (see below), whose sum is σ = 420142080. Its totient is φ = 45847296.

The previous prime is 172000117. The next prime is 172000133. The reversal of 172000122 is 221000271.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 51858 + ... + 55074.

It is an arithmetic number, because the mean of its divisors is an integer number (6564720).

Almost surely, 2^172000122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172000122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210071040).

172000122 is an abundant number, since it is smaller than the sum of its proper divisors (248141958).

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

172000122 is a wasteful number, since it uses less digits than its factorization.

172000122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3315.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 172000122 is about 13114.8816998096. The cubic root of 172000122 is about 556.1299081401.

Adding to 172000122 its reverse (221000271), we get a palindrome (393000393).

The spelling of 172000122 in words is "one hundred seventy-two million, one hundred twenty-two", and thus it is an aban number.