501441021 has 12 divisors (see below), whose sum is σ = 725085660. Its totient is φ = 333933120.

The previous prime is 501441013. The next prime is 501441049. The reversal of 501441021 is 120144105.

It can be written as a sum of positive squares in 2 ways, for example, as 298805796 + 202635225 = 17286^2 + 14235^2 .

It is not a de Polignac number, because 501441021 - 2³ = 501441013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 501440985 and 501441003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501441091) 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 11 ways as a sum of consecutive naturals, for example, 21136 + ... + 38073.

It is an arithmetic number, because the mean of its divisors is an integer number (60423805).

Almost surely, 2^501441021 is an apocalyptic number.

It is an amenable number.

501441021 is a deficient number, since it is larger than the sum of its proper divisors (223644639).

501441021 is a wasteful number, since it uses less digits than its factorization.

501441021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60156 (or 60153 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 501441021 is about 22392.8788010832. The cubic root of 501441021 is about 794.4622873931.

Adding to 501441021 its reverse (120144105), we get a palindrome (621585126).

The spelling of 501441021 in words is "five hundred one million, four hundred forty-one thousand, twenty-one".