491000 has 32 divisors (see below), whose sum is σ = 1151280. Its totient is φ = 196000.

The previous prime is 490993. The next prime is 491003. The reversal of 491000 is 194.

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 491000.

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 7 ways as a sum of consecutive naturals, for example, 755 + ... + 1245.

2⁴⁹¹⁰⁰⁰ is an apocalyptic number.

491000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (575640).

491000 is an abundant number, since it is smaller than the sum of its proper divisors (660280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491000 is a wasteful number, since it uses less digits than its factorization.

491000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 491000 is about 700.7139216542. The cubic root of 491000 is about 78.8909460402.

Adding to 491000 its reverse (194), we get a palindrome (491194).

The spelling of 491000 in words is "four hundred ninety-one thousand".