491135 has 4 divisors (see below), whose sum is σ = 589368. Its totient is φ = 392904.

The previous prime is 491129. The next prime is 491137. The reversal of 491135 is 531194.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 491135 - 2¹⁰ = 490111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 491135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49109 + ... + 49118.

It is an arithmetic number, because the mean of its divisors is an integer number (147342).

2⁴⁹¹¹³⁵ is an apocalyptic number.

491135 is a deficient number, since it is larger than the sum of its proper divisors (98233).

491135 is an equidigital number, since it uses as much as digits as its factorization.

491135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98232.

The product of its digits is 540, while the sum is 23.

The square root of 491135 is about 700.8102453589. The cubic root of 491135 is about 78.8981757088.

It can be divided in two parts, 491 and 135, that added together give a palindrome (626).

The spelling of 491135 in words is "four hundred ninety-one thousand, one hundred thirty-five".