491165 has 8 divisors (see below), whose sum is σ = 615168. Its totient is φ = 375760.

The previous prime is 491159. The next prime is 491167. The reversal of 491165 is 561194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 491165 - 2⁴ = 491149 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 (491167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2021 + ... + 2250.

It is an arithmetic number, because the mean of its divisors is an integer number (76896).

2⁴⁹¹¹⁶⁵ is an apocalyptic number.

It is an amenable number.

491165 is a deficient number, since it is larger than the sum of its proper divisors (124003).

491165 is a wasteful number, since it uses less digits than its factorization.

491165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4299.

The product of its digits is 1080, while the sum is 26.

The square root of 491165 is about 700.8316488287. The cubic root of 491165 is about 78.8997821219.

It can be divided in two parts, 491 and 165, that added together give a palindrome (656).

The spelling of 491165 in words is "four hundred ninety-one thousand, one hundred sixty-five".