491956 has 12 divisors (see below), whose sum is σ = 890820. Its totient is φ = 237440.

The previous prime is 491951. The next prime is 491969. The reversal of 491956 is 659194.

It can be written as a sum of positive squares in 2 ways, for example, as 401956 + 90000 = 634^2 + 300^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491951) by changing a digit.

491956 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2005 + ... + 2236.

It is an arithmetic number, because the mean of its divisors is an integer number (74235).

2⁴⁹¹⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

491956 is a deficient number, since it is larger than the sum of its proper divisors (398864).

491956 is a wasteful number, since it uses less digits than its factorization.

491956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4274 (or 4272 counting only the distinct ones).

The product of its digits is 9720, while the sum is 34.

The square root of 491956 is about 701.3957513416. The cubic root of 491956 is about 78.9421143014.

The spelling of 491956 in words is "four hundred ninety-one thousand, nine hundred fifty-six".