172172106 has 48 divisors (see below), whose sum is σ = 380305536. Its totient is φ = 56282688.

The previous prime is 172172093. The next prime is 172172131. The reversal of 172172106 is 601271271.

172172106 is nontrivially palindromic in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 172172106.

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 23 ways as a sum of consecutive naturals, for example, 371631 + ... + 372093.

It is an arithmetic number, because the mean of its divisors is an integer number (7923032).

Almost surely, 2^172172106 is an apocalyptic number.

172172106 is an abundant number, since it is smaller than the sum of its proper divisors (208133430).

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

172172106 is a wasteful number, since it uses less digits than its factorization.

172172106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 172172106 is about 13121.4368877802. The cubic root of 172172106 is about 556.3152056540.

The spelling of 172172106 in words is "one hundred seventy-two million, one hundred seventy-two thousand, one hundred six".