501140641 has 2 divisors, whose sum is σ = 501140642. Its totient is φ = 501140640.

The previous prime is 501140639. The next prime is 501140683. The reversal of 501140641 is 146041105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 443987041 + 57153600 = 21071^2 + 7560^2 .

It is a cyclic number.

It is not a de Polignac number, because 501140641 - 2¹ = 501140639 is a prime.

It is a super-2 number, since 2×501140641² = 502283884123781762, which contains 22 as substring.

Together with 501140639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (501140611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250570320 + 250570321.

It is an arithmetic number, because the mean of its divisors is an integer number (250570321).

Almost surely, 2^501140641 is an apocalyptic number.

It is an amenable number.

501140641 is a deficient number, since it is larger than the sum of its proper divisors (1).

501140641 is an equidigital number, since it uses as much as digits as its factorization.

501140641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 501140641 is about 22386.1707533915. The cubic root of 501140641 is about 794.3036191822.

Adding to 501140641 its reverse (146041105), we get a palindrome (647181746).

The spelling of 501140641 in words is "five hundred one million, one hundred forty thousand, six hundred forty-one".