172997242 has 16 divisors (see below), whose sum is σ = 297986400. Its totient is φ = 74496240.

The previous prime is 172997189. The next prime is 172997243. The reversal of 172997242 is 242799271.

It is not an unprimeable number, because it can be changed into a prime (172997243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206517 + ... + 207352.

It is an arithmetic number, because the mean of its divisors is an integer number (18624150).

Almost surely, 2^172997242 is an apocalyptic number.

172997242 is a deficient number, since it is larger than the sum of its proper divisors (124989158).

172997242 is a wasteful number, since it uses less digits than its factorization.

172997242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413901.

The product of its digits is 127008, while the sum is 43.

The square root of 172997242 is about 13152.8415941195. The cubic root of 172997242 is about 557.2025045122.

The spelling of 172997242 in words is "one hundred seventy-two million, nine hundred ninety-seven thousand, two hundred forty-two".