1161105729 has 16 divisors (see below), whose sum is σ = 1873381248. Its totient is φ = 624460032.

The previous prime is 1161105727. The next prime is 1161105731. The reversal of 1161105729 is 9275011611.

It is an interprime number because it is at equal distance from previous prime (1161105727) and next prime (1161105731).

It is not a de Polignac number, because 1161105729 - 2¹ = 1161105727 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1161105729.

It is not an unprimeable number, because it can be changed into a prime (1161105721) by changing a digit.

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, 1625842 + ... + 1626555.

It is an arithmetic number, because the mean of its divisors is an integer number (117086328).

Almost surely, 2^1161105729 is an apocalyptic number.

It is an amenable number.

1161105729 is a deficient number, since it is larger than the sum of its proper divisors (712275519).

1161105729 is a wasteful number, since it uses less digits than its factorization.

1161105729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252424.

The product of its (nonzero) digits is 3780, while the sum is 33.

The square root of 1161105729 is about 34075.0015260455. The cubic root of 1161105729 is about 1051.0513216070.

The spelling of 1161105729 in words is "one billion, one hundred sixty-one million, one hundred five thousand, seven hundred twenty-nine".