285484521 has 32 divisors (see below), whose sum is σ = 443573248. Its totient is φ = 159952320.

The previous prime is 285484513. The next prime is 285484543. The reversal of 285484521 is 125484582.

It is a happy number.

It is not a de Polignac number, because 285484521 - 2³ = 285484513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 285484521.

It is not an unprimeable number, because it can be changed into a prime (285485521) 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 31 ways as a sum of consecutive naturals, for example, 465411 + ... + 466023.

It is an arithmetic number, because the mean of its divisors is an integer number (13861664).

Almost surely, 2^285484521 is an apocalyptic number.

285484521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

285484521 is a deficient number, since it is larger than the sum of its proper divisors (158088727).

285484521 is a wasteful number, since it uses less digits than its factorization.

285484521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021.

The product of its digits is 102400, while the sum is 39.

The square root of 285484521 is about 16896.2871957126. The cubic root of 285484521 is about 658.4571560645.

The spelling of 285484521 in words is "two hundred eighty-five million, four hundred eighty-four thousand, five hundred twenty-one".