72587171 has 4 divisors (see below), whose sum is σ = 72610200. Its totient is φ = 72564144.

The previous prime is 72587147. The next prime is 72587173. The reversal of 72587171 is 17178527.

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 72587171 - 2¹⁰ = 72586147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72587173) 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, 5861 + ... + 13398.

It is an arithmetic number, because the mean of its divisors is an integer number (18152550).

Almost surely, 2^72587171 is an apocalyptic number.

72587171 is a deficient number, since it is larger than the sum of its proper divisors (23029).

72587171 is a wasteful number, since it uses less digits than its factorization.

72587171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23028.

The product of its digits is 27440, while the sum is 38.

The square root of 72587171 is about 8519.8105025875. The cubic root of 72587171 is about 417.1445976848.

The spelling of 72587171 in words is "seventy-two million, five hundred eighty-seven thousand, one hundred seventy-one".