72106171 has 2 divisors, whose sum is σ = 72106172. Its totient is φ = 72106170.

The previous prime is 72106169. The next prime is 72106241. The reversal of 72106171 is 17160127.

It is a weak prime.

It is an emirp because it is prime and its reverse (17160127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72106171 - 2¹ = 72106169 is a prime.

Together with 72106169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72101171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36053085 + 36053086.

It is an arithmetic number, because the mean of its divisors is an integer number (36053086).

Almost surely, 2^72106171 is an apocalyptic number.

72106171 is a deficient number, since it is larger than the sum of its proper divisors (1).

72106171 is an equidigital number, since it uses as much as digits as its factorization.

72106171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 72106171 is about 8491.5352557709. The cubic root of 72106171 is about 416.2211499031.

Adding to 72106171 its reverse (17160127), we get a palindrome (89266298).

The spelling of 72106171 in words is "seventy-two million, one hundred six thousand, one hundred seventy-one".