491001 has 16 divisors (see below), whose sum is σ = 758784. Its totient is φ = 276624.

The previous prime is 490993. The next prime is 491003. The reversal of 491001 is 100194.

It is not a de Polignac number, because 491001 - 2³ = 490993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491003) 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, 2050 + ... + 2276.

It is an arithmetic number, because the mean of its divisors is an integer number (47424).

2⁴⁹¹⁰⁰¹ is an apocalyptic number.

It is an amenable number.

491001 is a deficient number, since it is larger than the sum of its proper divisors (267783).

491001 is a wasteful number, since it uses less digits than its factorization.

491001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 491001 is about 700.7146352118. The cubic root of 491001 is about 78.8909995982.

Adding to 491001 its reverse (100194), we get a palindrome (591195).

The spelling of 491001 in words is "four hundred ninety-one thousand, one".