491271 has 8 divisors (see below), whose sum is σ = 714624. Its totient is φ = 297720.

The previous prime is 491261. The next prime is 491273. The reversal of 491271 is 172194.

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

It is not a de Polignac number, because 491271 - 2¹⁰ = 490247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491273) 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, 7411 + ... + 7476.

It is an arithmetic number, because the mean of its divisors is an integer number (89328).

2⁴⁹¹²⁷¹ is an apocalyptic number.

491271 is a deficient number, since it is larger than the sum of its proper divisors (223353).

491271 is a wasteful number, since it uses less digits than its factorization.

491271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14901.

The product of its digits is 504, while the sum is 24.

The square root of 491271 is about 700.9072691876. The cubic root of 491271 is about 78.9054575910.

The spelling of 491271 in words is "four hundred ninety-one thousand, two hundred seventy-one".