1149129785 has 36 divisors (see below), whose sum is σ = 1509258348. Its totient is φ = 839776896.

The previous prime is 1149129769. The next prime is 1149129871. The reversal of 1149129785 is 5879219411.

It can be written as a sum of positive squares in 6 ways, for example, as 190969 + 1148938816 = 437^2 + 33896^2 .

It is not a de Polignac number, because 1149129785 - 2⁴ = 1149129769 is a prime.

It is a Duffinian number.

Its product of digits (181440) is a multiple of the sum of its prime divisors (810).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1517627 + ... + 1518383.

It is an arithmetic number, because the mean of its divisors is an integer number (41923843).

Almost surely, 2^1149129785 is an apocalyptic number.

It is an amenable number.

1149129785 is a deficient number, since it is larger than the sum of its proper divisors (360128563).

1149129785 is an equidigital number, since it uses as much as digits as its factorization.

1149129785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858 (or 810 counting only the distinct ones).

The product of its digits is 181440, while the sum is 47.

The square root of 1149129785 is about 33898.8168672595. The cubic root of 1149129785 is about 1047.4252212213.

The spelling of 1149129785 in words is "one billion, one hundred forty-nine million, one hundred twenty-nine thousand, seven hundred eighty-five".