172125506 has 16 divisors (see below), whose sum is σ = 296605824. Its totient is φ = 73384704.

The previous prime is 172125467. The next prime is 172125511. The reversal of 172125506 is 605521271.

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 7 ways as a sum of consecutive naturals, for example, 29150 + ... + 34553.

It is an arithmetic number, because the mean of its divisors is an integer number (18537864).

Almost surely, 2^172125506 is an apocalyptic number.

172125506 is a deficient number, since it is larger than the sum of its proper divisors (124480318).

172125506 is a wasteful number, since it uses less digits than its factorization.

172125506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63905.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 172125506 is about 13119.6610474509. The cubic root of 172125506 is about 556.2650104774.

Adding to 172125506 its reverse (605521271), we get a palindrome (777646777).

The spelling of 172125506 in words is "one hundred seventy-two million, one hundred twenty-five thousand, five hundred six".