491186 has 4 divisors (see below), whose sum is σ = 736782. Its totient is φ = 245592.

The previous prime is 491171. The next prime is 491201. The reversal of 491186 is 681194.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (491171) and next prime (491201).

It can be written as a sum of positive squares in only one way, i.e., 398161 + 93025 = 631^2 + 305^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 491186.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 122795 + ... + 122798.

2⁴⁹¹¹⁸⁶ is an apocalyptic number.

491186 is a deficient number, since it is larger than the sum of its proper divisors (245596).

491186 is a wasteful number, since it uses less digits than its factorization.

491186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245595.

The product of its digits is 1728, while the sum is 29.

The square root of 491186 is about 700.8466308687. The cubic root of 491186 is about 78.9009065721.

The spelling of 491186 in words is "four hundred ninety-one thousand, one hundred eighty-six".