491111 has 8 divisors (see below), whose sum is σ = 510384. Its totient is φ = 472320.

The previous prime is 491083. The next prime is 491129. The reversal of 491111 is 111194.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491111 is a prime.

It is an Ulam number.

It is a Duffinian number.

491111 is a modest number, since divided by 1111 gives 49 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 491111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5015 + ... + 5111.

It is an arithmetic number, because the mean of its divisors is an integer number (63798).

2⁴⁹¹¹¹¹ is an apocalyptic number.

491111 is a deficient number, since it is larger than the sum of its proper divisors (19273).

491111 is an equidigital number, since it uses as much as digits as its factorization.

491111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241.

The product of its digits is 36, while the sum is 17.

The square root of 491111 is about 700.7931221124. The cubic root of 491111 is about 78.8968905312.

The spelling of 491111 in words is "four hundred ninety-one thousand, one hundred eleven".