172842942 has 16 divisors (see below), whose sum is σ = 349250832. Its totient is φ = 57020160.

The previous prime is 172842941. The next prime is 172842959. The reversal of 172842942 is 249248271.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 172842942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172842941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147909 + ... + 149072.

It is an arithmetic number, because the mean of its divisors is an integer number (21828177).

Almost surely, 2^172842942 is an apocalyptic number.

172842942 is an abundant number, since it is smaller than the sum of its proper divisors (176407890).

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

172842942 is a wasteful number, since it uses less digits than its factorization.

172842942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297083.

The product of its digits is 64512, while the sum is 39.

The square root of 172842942 is about 13146.9746329716. The cubic root of 172842942 is about 557.0367948945.

The spelling of 172842942 in words is "one hundred seventy-two million, eight hundred forty-two thousand, nine hundred forty-two".