1156104161 has 4 divisors (see below), whose sum is σ = 1162094532. Its totient is φ = 1150113792.

The previous prime is 1156104133. The next prime is 1156104199. The reversal of 1156104161 is 1614016511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1614016511 = 281 ⋅5743831.

It can be written as a sum of positive squares in 2 ways, for example, as 373223761 + 782880400 = 19319^2 + 27980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1156104161 is a prime.

It is a Duffinian number.

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 1156104161.

It is not an unprimeable number, because it can be changed into a prime (1156104461) 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 3 ways as a sum of consecutive naturals, for example, 2994896 + ... + 2995281.

It is an arithmetic number, because the mean of its divisors is an integer number (290523633).

Almost surely, 2^1156104161 is an apocalyptic number.

It is an amenable number.

1156104161 is a deficient number, since it is larger than the sum of its proper divisors (5990371).

1156104161 is an equidigital number, since it uses as much as digits as its factorization.

1156104161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5990370.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1156104161 is about 34001.5317449082. The cubic root of 1156104161 is about 1049.5399832226.

The spelling of 1156104161 in words is "one billion, one hundred fifty-six million, one hundred four thousand, one hundred sixty-one".