872155 has 4 divisors (see below), whose sum is σ = 1046592. Its totient is φ = 697720.

The previous prime is 872149. The next prime is 872159. The reversal of 872155 is 551278.

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

It is not a de Polignac number, because 872155 - 2⁹ = 871643 is a prime.

It is a Duffinian number.

872155 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (872159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87211 + ... + 87220.

It is an arithmetic number, because the mean of its divisors is an integer number (261648).

2⁸⁷²¹⁵⁵ is an apocalyptic number.

872155 is a deficient number, since it is larger than the sum of its proper divisors (174437).

872155 is a wasteful number, since it uses less digits than its factorization.

872155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174436.

The product of its digits is 2800, while the sum is 28.

The square root of 872155 is about 933.8923920881. The cubic root of 872155 is about 95.5427839330.

The spelling of 872155 in words is "eight hundred seventy-two thousand, one hundred fifty-five".