491100 has 36 divisors (see below), whose sum is σ = 1421784. Its totient is φ = 130880.

The previous prime is 491083. The next prime is 491129. The reversal of 491100 is 1194.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 491100.

It is a congruent number.

It is an unprimeable number.

491100 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 (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 519 + ... + 1118.

It is an arithmetic number, because the mean of its divisors is an integer number (39494).

2⁴⁹¹¹⁰⁰ is an apocalyptic number.

It is an amenable number.

491100 is an abundant number, since it is smaller than the sum of its proper divisors (930684).

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

491100 is a wasteful number, since it uses less digits than its factorization.

491100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654 (or 1647 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 491100 is about 700.7852738179. The cubic root of 491100 is about 78.8963014775.

Adding to 491100 its reverse (1194), we get a palindrome (492294).

The spelling of 491100 in words is "four hundred ninety-one thousand, one hundred".