71172165 has 8 divisors (see below), whose sum is σ = 113875488. Its totient is φ = 37958480.

The previous prime is 71172161. The next prime is 71172173. The reversal of 71172165 is 56127117.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71172165 - 2² = 71172161 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71172161) 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, 2372391 + ... + 2372420.

It is an arithmetic number, because the mean of its divisors is an integer number (14234436).

Almost surely, 2^71172165 is an apocalyptic number.

It is an amenable number.

71172165 is a deficient number, since it is larger than the sum of its proper divisors (42703323).

71172165 is a wasteful number, since it uses less digits than its factorization.

71172165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4744819.

The product of its digits is 2940, while the sum is 30.

The square root of 71172165 is about 8436.3597007240. The cubic root of 71172165 is about 414.4162014363.

The spelling of 71172165 in words is "seventy-one million, one hundred seventy-two thousand, one hundred sixty-five".