491571259 has 4 divisors (see below), whose sum is σ = 497793760. Its totient is φ = 485348760.

The previous prime is 491571253. The next prime is 491571277. The reversal of 491571259 is 952175194.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 491571259 - 2³ = 491571251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491571251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3111132 + ... + 3111289.

It is an arithmetic number, because the mean of its divisors is an integer number (124448440).

Almost surely, 2^491571259 is an apocalyptic number.

491571259 is a deficient number, since it is larger than the sum of its proper divisors (6222501).

491571259 is an equidigital number, since it uses as much as digits as its factorization.

491571259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6222500.

The product of its digits is 113400, while the sum is 43.

The square root of 491571259 is about 22171.4063378939. The cubic root of 491571259 is about 789.2152967655.

The spelling of 491571259 in words is "four hundred ninety-one million, five hundred seventy-one thousand, two hundred fifty-nine".