491255 has 4 divisors (see below), whose sum is σ = 589512. Its totient is φ = 393000.

The previous prime is 491251. The next prime is 491261. The reversal of 491255 is 552194.

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

It is not a de Polignac number, because 491255 - 2² = 491251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49121 + ... + 49130.

It is an arithmetic number, because the mean of its divisors is an integer number (147378).

2⁴⁹¹²⁵⁵ is an apocalyptic number.

491255 is a deficient number, since it is larger than the sum of its proper divisors (98257).

491255 is an equidigital number, since it uses as much as digits as its factorization.

491255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98256.

The product of its digits is 1800, while the sum is 26.

The square root of 491255 is about 700.8958553166. The cubic root of 491255 is about 78.9046009687.

The spelling of 491255 in words is "four hundred ninety-one thousand, two hundred fifty-five".