491043 has 16 divisors (see below), whose sum is σ = 761600. Its totient is φ = 275616.

The previous prime is 491041. The next prime is 491059. The reversal of 491043 is 340194.

It is not a de Polignac number, because 491043 - 2¹ = 491041 is a prime.

It is a super-2 number, since 2×491043² = 482246455698, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

491043 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (491041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1233 + ... + 1581.

It is an arithmetic number, because the mean of its divisors is an integer number (47600).

2⁴⁹¹⁰⁴³ is an apocalyptic number.

491043 is a deficient number, since it is larger than the sum of its proper divisors (270557).

491043 is a wasteful number, since it uses less digits than its factorization.

491043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 491043 is about 700.7446039749. The cubic root of 491043 is about 78.8932489674.

The spelling of 491043 in words is "four hundred ninety-one thousand, forty-three".