491266 has 8 divisors (see below), whose sum is σ = 780300. Its totient is φ = 231168.

The previous prime is 491261. The next prime is 491273. The reversal of 491266 is 662194.

It can be written as a sum of positive squares in 2 ways, for example, as 385641 + 105625 = 621^2 + 325^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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

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, 7191 + ... + 7258.

2⁴⁹¹²⁶⁶ is an apocalyptic number.

491266 is a deficient number, since it is larger than the sum of its proper divisors (289034).

491266 is a wasteful number, since it uses less digits than its factorization.

491266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14468.

The product of its digits is 2592, while the sum is 28.

The square root of 491266 is about 700.9037023729. The cubic root of 491266 is about 78.9051898985.

It can be divided in two parts, 491 and 266, that added together give a palindrome (757).

The spelling of 491266 in words is "four hundred ninety-one thousand, two hundred sixty-six".