491172 has 36 divisors (see below), whose sum is σ = 1271088. Its totient is φ = 146400.

The previous prime is 491171. The next prime is 491201. The reversal of 491172 is 271194.

It is not an unprimeable number, because it can be changed into a prime (491171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8022 + ... + 8082.

It is an arithmetic number, because the mean of its divisors is an integer number (35308).

2⁴⁹¹¹⁷² 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 491172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635544).

491172 is an abundant number, since it is smaller than the sum of its proper divisors (779916).

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

491172 is a wasteful number, since it uses less digits than its factorization.

491172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 77 counting only the distinct ones).

The product of its digits is 504, while the sum is 24.

The square root of 491172 is about 700.8366428776. The cubic root of 491172 is about 78.9001569422.

It can be divided in two parts, 49 and 1172, that added together give a palindrome (1221).

The spelling of 491172 in words is "four hundred ninety-one thousand, one hundred seventy-two".