1001000500 has 24 divisors (see below), whose sum is σ = 2186186184. Its totient is φ = 400400000.

The previous prime is 1001000471. The next prime is 1001000513. The reversal of 1001000500 is 50001001.

1001000500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 323856016 + 677144484 = 17996^2 + 26022^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1000501 + ... + 1001500.

It is an arithmetic number, because the mean of its divisors is an integer number (91091091).

Almost surely, 2^1001000500 is an apocalyptic number.

1001000500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001000500 is an abundant number, since it is smaller than the sum of its proper divisors (1185185684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1001000500 is a wasteful number, since it uses less digits than its factorization.

1001000500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002020 (or 2002008 counting only the distinct ones).

The product of its (nonzero) digits is 5, while the sum is 7.

The square root of 1001000500 is about 31638.5919408560. The cubic root of 1001000500 is about 1000.3333888395. Note that the first 4 decimals are identical.

Adding to 1001000500 its reverse (50001001), we get a palindrome (1051001501).

The spelling of 1001000500 in words is "one billion, one million, five hundred", and thus it is an aban number.