1131041985 has 8 divisors (see below), whose sum is σ = 1809667200. Its totient is φ = 603222384.

The previous prime is 1131041959. The next prime is 1131041987. The reversal of 1131041985 is 5891401311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1131041985 - 2⁸ = 1131041729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131041987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37701385 + ... + 37701414.

It is an arithmetic number, because the mean of its divisors is an integer number (226208400).

Almost surely, 2^1131041985 is an apocalyptic number.

1131041985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131041985 is a deficient number, since it is larger than the sum of its proper divisors (678625215).

1131041985 is an equidigital number, since it uses as much as digits as its factorization.

1131041985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75402807.

The product of its (nonzero) digits is 4320, while the sum is 33.

The square root of 1131041985 is about 33630.9676488798. The cubic root of 1131041985 is about 1041.9004897462.

The spelling of 1131041985 in words is "one billion, one hundred thirty-one million, forty-one thousand, nine hundred eighty-five".