172171294 has 4 divisors (see below), whose sum is σ = 258256944. Its totient is φ = 86085646.

The previous prime is 172171253. The next prime is 172171297. The reversal of 172171294 is 492171271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 492171271 = 2837 ⋅173483.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172171297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43042822 + ... + 43042825.

It is an arithmetic number, because the mean of its divisors is an integer number (64564236).

Almost surely, 2^172171294 is an apocalyptic number.

172171294 is a deficient number, since it is larger than the sum of its proper divisors (86085650).

172171294 is an equidigital number, since it uses as much as digits as its factorization.

172171294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86085649.

The product of its digits is 7056, while the sum is 34.

The square root of 172171294 is about 13121.4059460105. The cubic root of 172171294 is about 556.3143310860.

The spelling of 172171294 in words is "one hundred seventy-two million, one hundred seventy-one thousand, two hundred ninety-four".