485721 has 12 divisors (see below), whose sum is σ = 726180. Its totient is φ = 312480.

The previous prime is 485717. The next prime is 485729. The reversal of 485721 is 127584.

It can be written as a sum of positive squares in 2 ways, for example, as 81225 + 404496 = 285^2 + 636^2 .

It is not a de Polignac number, because 485721 - 2² = 485717 is a prime.

485721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (485729) 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 11 ways as a sum of consecutive naturals, for example, 670 + ... + 1191.

It is an arithmetic number, because the mean of its divisors is an integer number (60515).

2⁴⁸⁵⁷²¹ is an apocalyptic number.

It is an amenable number.

485721 is a deficient number, since it is larger than the sum of its proper divisors (240459).

485721 is a wasteful number, since it uses less digits than its factorization.

485721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896 (or 1893 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 485721 is about 696.9368694509. The cubic root of 485721 is about 78.6071939495.

The spelling of 485721 in words is "four hundred eighty-five thousand, seven hundred twenty-one".