72168271 has 4 divisors (see below), whose sum is σ = 82478032. Its totient is φ = 61858512.

The previous prime is 72168259. The next prime is 72168287. The reversal of 72168271 is 17286127.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72168271 - 2⁹ = 72167759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72168221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5154870 + ... + 5154883.

It is an arithmetic number, because the mean of its divisors is an integer number (20619508).

Almost surely, 2^72168271 is an apocalyptic number.

72168271 is a deficient number, since it is larger than the sum of its proper divisors (10309761).

72168271 is a wasteful number, since it uses less digits than its factorization.

72168271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10309760.

The product of its digits is 9408, while the sum is 34.

The square root of 72168271 is about 8495.1910514126. The cubic root of 72168271 is about 416.3406030023.

The spelling of 72168271 in words is "seventy-two million, one hundred sixty-eight thousand, two hundred seventy-one".