172136252 has 12 divisors (see below), whose sum is σ = 303043440. Its totient is φ = 85552416.

The previous prime is 172136243. The next prime is 172136281. The reversal of 172136252 is 252631271.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 128177 + ... + 129512.

It is an arithmetic number, because the mean of its divisors is an integer number (25253620).

Almost surely, 2^172136252 is an apocalyptic number.

It is an amenable number.

172136252 is a deficient number, since it is larger than the sum of its proper divisors (130907188).

172136252 is a wasteful number, since it uses less digits than its factorization.

172136252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257860 (or 257858 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 172136252 is about 13120.0705790785. The cubic root of 172136252 is about 556.2765863318.

It can be divided in two parts, 1721 and 36252, that added together give a palindrome (37973).

The spelling of 172136252 in words is "one hundred seventy-two million, one hundred thirty-six thousand, two hundred fifty-two".