172171242 has 24 divisors (see below), whose sum is σ = 380078244. Its totient is φ = 56307264.

The previous prime is 172171213. The next prime is 172171253. The reversal of 172171242 is 242171271.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 170851041 + 1320201 = 13071^2 + 1149^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89283 + ... + 91190.

Almost surely, 2^172171242 is an apocalyptic number.

172171242 is an abundant number, since it is smaller than the sum of its proper divisors (207907002).

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

172171242 is a wasteful number, since it uses less digits than its factorization.

172171242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180534 (or 180531 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 172171242 is about 13121.4039645154. The cubic root of 172171242 is about 556.3142750791.

The spelling of 172171242 in words is "one hundred seventy-two million, one hundred seventy-one thousand, two hundred forty-two".