731172 has 48 divisors (see below), whose sum is σ = 1897280. Its totient is φ = 217728.

The previous prime is 731141. The next prime is 731173. The reversal of 731172 is 271137.

It is a super-2 number, since 2×731172² = 1069224987168, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 731172.

It is not an unprimeable number, because it can be changed into a prime (731173) by changing a digit.

731172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6654 + ... + 6762.

2⁷³¹¹⁷² 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 731172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948640).

731172 is an abundant number, since it is smaller than the sum of its proper divisors (1166108).

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

731172 is a wasteful number, since it uses less digits than its factorization.

731172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 170 counting only the distinct ones).

The product of its digits is 294, while the sum is 21.

The square root of 731172 is about 855.0859605911. The cubic root of 731172 is about 90.0892940930.

It can be divided in two parts, 731 and 172, that added together give a triangular number (903 = T₄₂).

The spelling of 731172 in words is "seven hundred thirty-one thousand, one hundred seventy-two".