491147 has 8 divisors (see below), whose sum is σ = 526176. Its totient is φ = 456832.

The previous prime is 491137. The next prime is 491149. The reversal of 491147 is 741194.

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

It is a cyclic number.

It is not a de Polignac number, because 491147 - 2⁶ = 491083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2753 + ... + 2925.

It is an arithmetic number, because the mean of its divisors is an integer number (65772).

2⁴⁹¹¹⁴⁷ is an apocalyptic number.

491147 is a deficient number, since it is larger than the sum of its proper divisors (35029).

491147 is a wasteful number, since it uses less digits than its factorization.

491147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357.

The product of its digits is 1008, while the sum is 26.

The square root of 491147 is about 700.8188068253. The cubic root of 491147 is about 78.8988182819.

Subtracting 491147 from its reverse (741194), we obtain a cube (250047 = 63³).

The spelling of 491147 in words is "four hundred ninety-one thousand, one hundred forty-seven".