1146561165 has 12 divisors (see below), whose sum is σ = 1987372764. Its totient is φ = 611499264.

The previous prime is 1146561149. The next prime is 1146561173. The reversal of 1146561165 is 5611656411.

It can be written as a sum of positive squares in 2 ways, for example, as 861187716 + 285373449 = 29346^2 + 16893^2 .

It is not a de Polignac number, because 1146561165 - 2⁴ = 1146561149 is a prime.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 12739524 + ... + 12739613.

It is an arithmetic number, because the mean of its divisors is an integer number (165614397).

Almost surely, 2^1146561165 is an apocalyptic number.

1146561165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1146561165 is a deficient number, since it is larger than the sum of its proper divisors (840811599).

1146561165 is a wasteful number, since it uses less digits than its factorization.

1146561165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25479148 (or 25479145 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 1146561165 is about 33860.9090988414. The cubic root of 1146561165 is about 1046.6442115327.

The spelling of 1146561165 in words is "one billion, one hundred forty-six million, five hundred sixty-one thousand, one hundred sixty-five".