72134171 has 4 divisors (see below), whose sum is σ = 72151200. Its totient is φ = 72117144.

The previous prime is 72134149. The next prime is 72134173. The reversal of 72134171 is 17143127.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 72134171 - 2¹⁰ = 72133147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72134171.

It is not an unprimeable number, because it can be changed into a prime (72134173) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3365 + ... + 12473.

It is an arithmetic number, because the mean of its divisors is an integer number (18037800).

Almost surely, 2^72134171 is an apocalyptic number.

72134171 is a deficient number, since it is larger than the sum of its proper divisors (17029).

72134171 is an equidigital number, since it uses as much as digits as its factorization.

72134171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17028.

The product of its digits is 1176, while the sum is 26.

The square root of 72134171 is about 8493.1837964335. The cubic root of 72134171 is about 416.2750180804.

Adding to 72134171 its reverse (17143127), we get a palindrome (89277298).

The spelling of 72134171 in words is "seventy-two million, one hundred thirty-four thousand, one hundred seventy-one".