491056 has 20 divisors (see below), whose sum is σ = 973152. Its totient is φ = 239936.

The previous prime is 491041. The next prime is 491059. The reversal of 491056 is 650194.

It is a super-2 number, since 2×491056² = 482271990272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 491056.

It is not an unprimeable number, because it can be changed into a prime (491059) by changing a digit.

491056 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426 + ... + 1078.

2⁴⁹¹⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

491056 is a deficient number, since it is larger than the sum of its proper divisors (482096).

491056 is a wasteful number, since it uses less digits than its factorization.

491056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708 (or 702 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 491056 is about 700.7538797609. The cubic root of 491056 is about 78.8939451747.

The spelling of 491056 in words is "four hundred ninety-one thousand, fifty-six".