1131002005 has 16 divisors (see below), whose sum is σ = 1553163264. Its totient is φ = 774506880.

The previous prime is 1131002003. The next prime is 1131002011. The reversal of 1131002005 is 5002001311.

It is not a de Polignac number, because 1131002005 - 2¹ = 1131002003 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 (1131002003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5404 + ... + 47866.

It is an arithmetic number, because the mean of its divisors is an integer number (97072704).

Almost surely, 2^1131002005 is an apocalyptic number.

It is an amenable number.

1131002005 is a deficient number, since it is larger than the sum of its proper divisors (422161259).

1131002005 is an equidigital number, since it uses as much as digits as its factorization.

1131002005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43236.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 1131002005 is about 33630.3732509766. The cubic root of 1131002005 is about 1041.8882132575. Note that the first 3 decimals are identical.

Adding to 1131002005 its reverse (5002001311), we get a palindrome (6133003316).

The spelling of 1131002005 in words is "one billion, one hundred thirty-one million, two thousand, five".