485991 has 12 divisors (see below), whose sum is σ = 765960. Its totient is φ = 294480.

The previous prime is 485977. The next prime is 485993. The reversal of 485991 is 199584.

485991 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 485991 - 2⁵ = 485959 is a prime.

485991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (485993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2356 + ... + 2553.

It is an arithmetic number, because the mean of its divisors is an integer number (63830).

2⁴⁸⁵⁹⁹¹ is an apocalyptic number.

485991 is a deficient number, since it is larger than the sum of its proper divisors (279969).

485991 is a wasteful number, since it uses less digits than its factorization.

485991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926 (or 4923 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 485991 is about 697.1305473152. The cubic root of 485991 is about 78.6217565008.

It can be divided in two parts, 4859 and 91, that added together give a triangular number (4950 = T₉₉).

The spelling of 485991 in words is "four hundred eighty-five thousand, nine hundred ninety-one".