871545 has 16 divisors (see below), whose sum is σ = 1411200. Its totient is φ = 459264.

The previous prime is 871531. The next prime is 871553. The reversal of 871545 is 545178.

It is not a de Polignac number, because 871545 - 2⁵ = 871513 is a prime.

871545 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1156 + ... + 1754.

It is an arithmetic number, because the mean of its divisors is an integer number (88200).

2⁸⁷¹⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

871545 is a deficient number, since it is larger than the sum of its proper divisors (539655).

871545 is a wasteful number, since it uses less digits than its factorization.

871545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704.

The product of its digits is 5600, while the sum is 30.

The square root of 871545 is about 933.5657448729. The cubic root of 871545 is about 95.5205039899.

The spelling of 871545 in words is "eight hundred seventy-one thousand, five hundred forty-five".