172871242 has 16 divisors (see below), whose sum is σ = 263531520. Its totient is φ = 85038912.

The previous prime is 172871203. The next prime is 172871261. The reversal of 172871242 is 242178271.

It is a happy number.

172871242 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 172871198 and 172871207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28663 + ... + 34165.

It is an arithmetic number, because the mean of its divisors is an integer number (16470720).

Almost surely, 2^172871242 is an apocalyptic number.

172871242 is a deficient number, since it is larger than the sum of its proper divisors (90660278).

172871242 is a wasteful number, since it uses less digits than its factorization.

172871242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5757.

The product of its digits is 12544, while the sum is 34.

The square root of 172871242 is about 13148.0508821650. The cubic root of 172871242 is about 557.0671949035.

The spelling of 172871242 in words is "one hundred seventy-two million, eight hundred seventy-one thousand, two hundred forty-two".