1156346161 has 4 divisors (see below), whose sum is σ = 1156724800. Its totient is φ = 1155967524.

The previous prime is 1156346141. The next prime is 1156346167. The reversal of 1156346161 is 1616436511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1156346161 - 2⁷ = 1156346033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156346167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184701 + ... + 190858.

It is an arithmetic number, because the mean of its divisors is an integer number (289181200).

Almost surely, 2^1156346161 is an apocalyptic number.

It is an amenable number.

1156346161 is a deficient number, since it is larger than the sum of its proper divisors (378639).

1156346161 is an equidigital number, since it uses as much as digits as its factorization.

1156346161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378638.

The product of its digits is 12960, while the sum is 34.

The square root of 1156346161 is about 34005.0902219065. The cubic root of 1156346161 is about 1049.6132093109.

The spelling of 1156346161 in words is "one billion, one hundred fifty-six million, three hundred forty-six thousand, one hundred sixty-one".