172740122 has 16 divisors (see below), whose sum is σ = 270235392. Its totient is φ = 82719360.

The previous prime is 172740103. The next prime is 172740133. The reversal of 172740122 is 221047271.

172740122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 172740091 and 172740100.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8348 + ... + 20375.

It is an arithmetic number, because the mean of its divisors is an integer number (16889712).

Almost surely, 2^172740122 is an apocalyptic number.

172740122 is a deficient number, since it is larger than the sum of its proper divisors (97495270).

172740122 is a wasteful number, since it uses less digits than its factorization.

172740122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28853.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 172740122 is about 13143.0636458932. The cubic root of 172740122 is about 556.9263171713.

Adding to 172740122 its reverse (221047271), we get a palindrome (393787393).

The spelling of 172740122 in words is "one hundred seventy-two million, seven hundred forty thousand, one hundred twenty-two".