485581 has 4 divisors (see below), whose sum is σ = 487612. Its totient is φ = 483552.

The previous prime is 485567. The next prime is 485587. The reversal of 485581 is 185584.

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 42025 + 443556 = 205^2 + 666^2 .

It is a cyclic number.

It is not a de Polignac number, because 485581 - 2¹⁵ = 452813 is a prime.

It is a super-2 number, since 2×485581² = 471577815122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (485587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600 + ... + 1153.

It is an arithmetic number, because the mean of its divisors is an integer number (121903).

2⁴⁸⁵⁵⁸¹ is an apocalyptic number.

It is an amenable number.

485581 is a deficient number, since it is larger than the sum of its proper divisors (2031).

485581 is a wasteful number, since it uses less digits than its factorization.

485581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030.

The product of its digits is 6400, while the sum is 31.

The square root of 485581 is about 696.8364226990. The cubic root of 485581 is about 78.5996408723.

The spelling of 485581 in words is "four hundred eighty-five thousand, five hundred eighty-one".