491140 has 24 divisors (see below), whose sum is σ = 1111320. Its totient is φ = 181248.

The previous prime is 491137. The next prime is 491149. The reversal of 491140 is 41194.

It can be written as a sum of positive squares in 4 ways, for example, as 6724 + 484416 = 82^2 + 696^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685 + ... + 1204.

It is an arithmetic number, because the mean of its divisors is an integer number (46305).

2⁴⁹¹¹⁴⁰ is an apocalyptic number.

It is an amenable number.

491140 is an abundant number, since it is smaller than the sum of its proper divisors (620180).

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

491140 is a wasteful number, since it uses less digits than its factorization.

491140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911 (or 1909 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 491140 is about 700.8138126493. The cubic root of 491140 is about 78.8984434488.

The spelling of 491140 in words is "four hundred ninety-one thousand, one hundred forty".