871572 has 48 divisors (see below), whose sum is σ = 2264192. Its totient is φ = 259200.

The previous prime is 871571. The next prime is 871589. The reversal of 871572 is 275178.

It is a happy number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871571) 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, 5697 + ... + 5847.

2⁸⁷¹⁵⁷² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 871572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1132096).

871572 is an abundant number, since it is smaller than the sum of its proper divisors (1392620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

871572 is a wasteful number, since it uses less digits than its factorization.

871572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 206 counting only the distinct ones).

The product of its digits is 3920, while the sum is 30.

The square root of 871572 is about 933.5802054457. The cubic root of 871572 is about 95.5214903712.

The spelling of 871572 in words is "eight hundred seventy-one thousand, five hundred seventy-two".