1001506501 has 4 divisors (see below), whose sum is σ = 1001569932. Its totient is φ = 1001443072.

The previous prime is 1001506489. The next prime is 1001506591. The reversal of 1001506501 is 1056051001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 783944001 + 217562500 = 27999^2 + 14750^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001506501 - 2¹¹ = 1001504453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001506591) 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 in 3 ways as a sum of consecutive naturals, for example, 12735 + ... + 46531.

It is an arithmetic number, because the mean of its divisors is an integer number (250392483).

Almost surely, 2^1001506501 is an apocalyptic number.

It is an amenable number.

1001506501 is a deficient number, since it is larger than the sum of its proper divisors (63431).

1001506501 is an equidigital number, since it uses as much as digits as its factorization.

1001506501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63430.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1001506501 is about 31646.5875095562. The cubic root of 1001506501 is about 1000.5019150391.

Adding to 1001506501 its reverse (1056051001), we get a palindrome (2057557502).

The spelling of 1001506501 in words is "one billion, one million, five hundred six thousand, five hundred one".