491481 has 16 divisors (see below), whose sum is σ = 739200. Its totient is φ = 322704.

The previous prime is 491461. The next prime is 491483. The reversal of 491481 is 184194.

It is not a de Polignac number, because 491481 - 2⁶ = 491417 is a prime.

It is a super-2 number, since 2×491481² = 483107146722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (491483) 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, 2860 + ... + 3026.

It is an arithmetic number, because the mean of its divisors is an integer number (46200).

2⁴⁹¹⁴⁸¹ is an apocalyptic number.

It is an amenable number.

491481 is a deficient number, since it is larger than the sum of its proper divisors (247719).

491481 is a wasteful number, since it uses less digits than its factorization.

491481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 279 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 491481 is about 701.0570590187. The cubic root of 491481 is about 78.9166990345.

The spelling of 491481 in words is "four hundred ninety-one thousand, four hundred eighty-one".