491458 has 16 divisors (see below), whose sum is σ = 816480. Its totient is φ = 220000.

The previous prime is 491429. The next prime is 491461. The reversal of 491458 is 854194.

It is a happy number.

It is an unprimeable number.

491458 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1833 + ... + 2083.

It is an arithmetic number, because the mean of its divisors is an integer number (51030).

2⁴⁹¹⁴⁵⁸ is an apocalyptic number.

491458 is a deficient number, since it is larger than the sum of its proper divisors (325022).

491458 is a wasteful number, since it uses less digits than its factorization.

491458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353.

The product of its digits is 5760, while the sum is 31.

The square root of 491458 is about 701.0406550265. The cubic root of 491458 is about 78.9154679850.

It can be divided in two parts, 491 and 458, that added together give a palindrome (949).

The spelling of 491458 in words is "four hundred ninety-one thousand, four hundred fifty-eight".