491854 has 16 divisors (see below), whose sum is σ = 817920. Its totient is φ = 219960.

The previous prime is 491851. The next prime is 491857. The reversal of 491854 is 458194.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (491851) and next prime (491857).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491851) 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, 1597 + ... + 1879.

It is an arithmetic number, because the mean of its divisors is an integer number (51120).

2⁴⁹¹⁸⁵⁴ is an apocalyptic number.

491854 is a deficient number, since it is larger than the sum of its proper divisors (326066).

491854 is a wasteful number, since it uses less digits than its factorization.

491854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375.

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

The square root of 491854 is about 701.3230354124. The cubic root of 491854 is about 78.9366580870.

The spelling of 491854 in words is "four hundred ninety-one thousand, eight hundred fifty-four".