500145021 has 12 divisors (see below), whose sum is σ = 741957372. Its totient is φ = 324418176.

The previous prime is 500145013. The next prime is 500145043. The reversal of 500145021 is 120541005.

500145021 is a `hidden beast` number, since 500 + 145 + 0 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 436224996 + 63920025 = 20886^2 + 7995^2 .

It is not a de Polignac number, because 500145021 - 2³ = 500145013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 500144985 and 500145003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500145011) 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, 750636 + ... + 751301.

It is an arithmetic number, because the mean of its divisors is an integer number (61829781).

Almost surely, 2^500145021 is an apocalyptic number.

It is an amenable number.

500145021 is a deficient number, since it is larger than the sum of its proper divisors (241812351).

500145021 is a wasteful number, since it uses less digits than its factorization.

500145021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501980 (or 1501977 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 500145021 is about 22363.9223080389. The cubic root of 500145021 is about 793.7772540624. Note that the first 3 decimals are identical.

Adding to 500145021 its reverse (120541005), we get a palindrome (620686026).

The spelling of 500145021 in words is "five hundred million, one hundred forty-five thousand, twenty-one".