491155 has 8 divisors (see below), whose sum is σ = 673632. Its totient is φ = 336768.

The previous prime is 491149. The next prime is 491159. The reversal of 491155 is 551194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 491155 - 2⁹ = 490643 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491159) by changing a digit.

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, 6982 + ... + 7051.

It is an arithmetic number, because the mean of its divisors is an integer number (84204).

2⁴⁹¹¹⁵⁵ is an apocalyptic number.

491155 is a deficient number, since it is larger than the sum of its proper divisors (182477).

491155 is a wasteful number, since it uses less digits than its factorization.

491155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14045.

The product of its digits is 900, while the sum is 25.

The square root of 491155 is about 700.8245144114. The cubic root of 491155 is about 78.8992466581.

It can be divided in two parts, 491 and 155, that added together give a palindrome (646).

The spelling of 491155 in words is "four hundred ninety-one thousand, one hundred fifty-five".