172698142 has 4 divisors (see below), whose sum is σ = 259047216. Its totient is φ = 86349070.

The previous prime is 172698139. The next prime is 172698151. The reversal of 172698142 is 241896271.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 172698095 and 172698104.

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 as a sum of consecutive naturals, namely, 43174534 + ... + 43174537.

It is an arithmetic number, because the mean of its divisors is an integer number (64761804).

Almost surely, 2^172698142 is an apocalyptic number.

172698142 is a deficient number, since it is larger than the sum of its proper divisors (86349074).

172698142 is an equidigital number, since it uses as much as digits as its factorization.

172698142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86349073.

The product of its digits is 48384, while the sum is 40.

The square root of 172698142 is about 13141.4665087273. The cubic root of 172698142 is about 556.8811980241.

The spelling of 172698142 in words is "one hundred seventy-two million, six hundred ninety-eight thousand, one hundred forty-two".