491841 has 24 divisors (see below), whose sum is σ = 837824. Its totient is φ = 272160.

The previous prime is 491837. The next prime is 491851. The reversal of 491841 is 148194.

It is not a de Polignac number, because 491841 - 2² = 491837 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2226 + ... + 2436.

2⁴⁹¹⁸⁴¹ is an apocalyptic number.

It is an amenable number.

491841 is a deficient number, since it is larger than the sum of its proper divisors (345983).

491841 is a wasteful number, since it uses less digits than its factorization.

491841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 258 counting only the distinct ones).

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

The square root of 491841 is about 701.3137671542. The cubic root of 491841 is about 78.9359626329.

It can be divided in two parts, 49 and 1841, that multiplied together give a palindrome (90209).

The spelling of 491841 in words is "four hundred ninety-one thousand, eight hundred forty-one".