506589021 has 6 divisors (see below), whose sum is σ = 731739710. Its totient is φ = 337726008.

The previous prime is 506588959. The next prime is 506589029. The reversal of 506589021 is 120985605.

It is a happy number.

506589021 is a `hidden beast` number, since 50 + 6 + 589 + 0 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 380835225 + 125753796 = 19515^2 + 11214^2 .

It is not a de Polignac number, because 506589021 - 2¹¹ = 506586973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506589029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28143826 + ... + 28143843.

Almost surely, 2^506589021 is an apocalyptic number.

It is an amenable number.

506589021 is a deficient number, since it is larger than the sum of its proper divisors (225150689).

506589021 is a wasteful number, since it uses less digits than its factorization.

506589021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56287675 (or 56287672 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 506589021 is about 22507.5325391301. The cubic root of 506589021 is about 797.1717951246.

The spelling of 506589021 in words is "five hundred six million, five hundred eighty-nine thousand, twenty-one".