1161149859 has 24 divisors (see below), whose sum is σ = 1696060080. Its totient is φ = 765433152.

The previous prime is 1161149851. The next prime is 1161149867. The reversal of 1161149859 is 9589411611.

It is an interprime number because it is at equal distance from previous prime (1161149851) and next prime (1161149867).

It is not a de Polignac number, because 1161149859 - 2³ = 1161149851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161149851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 669157 + ... + 670889.

It is an arithmetic number, because the mean of its divisors is an integer number (70669170).

Almost surely, 2^1161149859 is an apocalyptic number.

1161149859 is a deficient number, since it is larger than the sum of its proper divisors (534910221).

1161149859 is a wasteful number, since it uses less digits than its factorization.

1161149859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2531 (or 2528 counting only the distinct ones).

The product of its digits is 77760, while the sum is 45.

The square root of 1161149859 is about 34075.6490620502. The cubic root of 1161149859 is about 1051.0646371636.

The spelling of 1161149859 in words is "one billion, one hundred sixty-one million, one hundred forty-nine thousand, eight hundred fifty-nine".