491268 has 12 divisors (see below), whose sum is σ = 1146320. Its totient is φ = 163752.

The previous prime is 491261. The next prime is 491273. The reversal of 491268 is 862194.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (491261) by changing a digit.

491268 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, 20458 + ... + 20481.

2⁴⁹¹²⁶⁸ is an apocalyptic number.

It is an amenable number.

491268 is an abundant number, since it is smaller than the sum of its proper divisors (655052).

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

491268 is a wasteful number, since it uses less digits than its factorization.

491268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40946 (or 40944 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 491268 is about 700.9051291009. The cubic root of 491268 is about 78.9052969757.

The spelling of 491268 in words is "four hundred ninety-one thousand, two hundred sixty-eight".