731871 has 12 divisors (see below), whose sum is σ = 1208272. Its totient is φ = 418176.

The previous prime is 731869. The next prime is 731881. The reversal of 731871 is 178137.

It is not a de Polignac number, because 731871 - 2¹ = 731869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731821) 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 11 ways as a sum of consecutive naturals, for example, 5746 + ... + 5871.

2⁷³¹⁸⁷¹ is an apocalyptic number.

731871 is a deficient number, since it is larger than the sum of its proper divisors (476401).

731871 is a wasteful number, since it uses less digits than its factorization.

731871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11630 (or 11627 counting only the distinct ones).

The product of its digits is 1176, while the sum is 27.

The square root of 731871 is about 855.4945937877. The cubic root of 731871 is about 90.1179933868.

It can be divided in two parts, 7 and 31871, that added together give a triangular number (31878 = T₂₅₂).

The spelling of 731871 in words is "seven hundred thirty-one thousand, eight hundred seventy-one".