1001332005 has 16 divisors (see below), whose sum is σ = 1604016960. Its totient is φ = 533415168.

The previous prime is 1001331997. The next prime is 1001332049. The reversal of 1001332005 is 5002331001.

It is a happy number.

It is not a de Polignac number, because 1001332005 - 2³ = 1001331997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25972 + ... + 51741.

It is an arithmetic number, because the mean of its divisors is an integer number (100251060).

Almost surely, 2^1001332005 is an apocalyptic number.

1001332005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1001332005 is a deficient number, since it is larger than the sum of its proper divisors (602684955).

1001332005 is an equidigital number, since it uses as much as digits as its factorization.

1001332005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78580.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1001332005 is about 31643.8304413356. The cubic root of 1001332005 is about 1000.4438046749.

Adding to 1001332005 its reverse (5002331001), we get a palindrome (6003663006).

The spelling of 1001332005 in words is "one billion, one million, three hundred thirty-two thousand, five".