491485 has 4 divisors (see below), whose sum is σ = 589788. Its totient is φ = 393184.

The previous prime is 491483. The next prime is 491489. The reversal of 491485 is 584194.

It is a happy number.

491485 is nontrivially palindromic in base 4.

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

It can be written as a sum of positive squares in 2 ways, for example, as 109561 + 381924 = 331^2 + 618^2 .

It is a cyclic number.

It is not a de Polignac number, because 491485 - 2¹ = 491483 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 (491483) 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, 49144 + ... + 49153.

It is an arithmetic number, because the mean of its divisors is an integer number (147447).

2⁴⁹¹⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

491485 is a deficient number, since it is larger than the sum of its proper divisors (98303).

491485 is an equidigital number, since it uses as much as digits as its factorization.

491485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98302.

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

The square root of 491485 is about 701.0599118478. The cubic root of 491485 is about 78.9169131262.

It can be divided in two parts, 4 and 91485, that multiplied together give a triangular number (365940 = T₈₅₅).

The spelling of 491485 in words is "four hundred ninety-one thousand, four hundred eighty-five".