72712171 has 16 divisors (see below), whose sum is σ = 84478464. Its totient is φ = 61300224.

The previous prime is 72712169. The next prime is 72712201. The reversal of 72712171 is 17121727.

It is a cyclic number.

It is not a de Polignac number, because 72712171 - 2¹ = 72712169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72712271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144306 + ... + 144808.

It is an arithmetic number, because the mean of its divisors is an integer number (5279904).

Almost surely, 2^72712171 is an apocalyptic number.

72712171 is a deficient number, since it is larger than the sum of its proper divisors (11766293).

72712171 is a wasteful number, since it uses less digits than its factorization.

72712171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810.

The product of its digits is 1372, while the sum is 28.

The square root of 72712171 is about 8527.1431910107. The cubic root of 72712171 is about 417.3839107356.

Adding to 72712171 its reverse (17121727), we get a palindrome (89833898).

The spelling of 72712171 in words is "seventy-two million, seven hundred twelve thousand, one hundred seventy-one".