872187 has 8 divisors (see below), whose sum is σ = 1167936. Its totient is φ = 578952.

The previous prime is 872177. The next prime is 872189. The reversal of 872187 is 781278.

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

It is not a de Polignac number, because 872187 - 2⁸ = 871931 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

872187 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (872189) 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, 448 + ... + 1394.

It is an arithmetic number, because the mean of its divisors is an integer number (145992).

2⁸⁷²¹⁸⁷ is an apocalyptic number.

872187 is a deficient number, since it is larger than the sum of its proper divisors (295749).

872187 is a wasteful number, since it uses less digits than its factorization.

872187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257.

The product of its digits is 6272, while the sum is 33.

The square root of 872187 is about 933.9095245258. The cubic root of 872187 is about 95.5439524300.

Subtracting from 872187 its reverse (781278), we obtain a palindrome (90909).

The spelling of 872187 in words is "eight hundred seventy-two thousand, one hundred eighty-seven".