491471 has 6 divisors (see below), whose sum is σ = 506520. Its totient is φ = 476856.

The previous prime is 491461. The next prime is 491483. The reversal of 491471 is 174194.

It is a de Polignac number, because none of the positive numbers 2^k-491471 is a prime.

It is a super-3 number, since 3×491471³ = 356135235987840333, which contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 491471.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 491471.

It is not an unprimeable number, because it can be changed into a prime (491461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1190 + ... + 1548.

It is an arithmetic number, because the mean of its divisors is an integer number (84420).

2⁴⁹¹⁴⁷¹ is an apocalyptic number.

491471 is a deficient number, since it is larger than the sum of its proper divisors (15049).

491471 is an equidigital number, since it uses as much as digits as its factorization.

491471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 396 counting only the distinct ones).

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

The square root of 491471 is about 701.0499268954. The cubic root of 491471 is about 78.9161638003.

The spelling of 491471 in words is "four hundred ninety-one thousand, four hundred seventy-one".