1145840865 has 16 divisors (see below), whose sum is σ = 1974372288. Its totient is φ = 564106176.

The previous prime is 1145840791. The next prime is 1145840873. The reversal of 1145840865 is 5680485411.

1145840865 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1145840865 - 2¹⁹ = 1145316577 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2937859 + ... + 2938248.

It is an arithmetic number, because the mean of its divisors is an integer number (123398268).

Almost surely, 2^1145840865 is an apocalyptic number.

1145840865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1145840865 is a deficient number, since it is larger than the sum of its proper divisors (828531423).

1145840865 is a wasteful number, since it uses less digits than its factorization.

1145840865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5876128.

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 1145840865 is about 33850.2712692232. The cubic root of 1145840865 is about 1046.4249891087.

The spelling of 1145840865 in words is "one billion, one hundred forty-five million, eight hundred forty thousand, eight hundred sixty-five".