1159263161 has 4 divisors (see below), whose sum is σ = 1324872192. Its totient is φ = 993654132.

The previous prime is 1159263137. The next prime is 1159263173. The reversal of 1159263161 is 1613629511.

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 1159263161 - 2²² = 1155068857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1159263461) 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, 82804505 + ... + 82804518.

It is an arithmetic number, because the mean of its divisors is an integer number (331218048).

Almost surely, 2^1159263161 is an apocalyptic number.

It is an amenable number.

1159263161 is a deficient number, since it is larger than the sum of its proper divisors (165609031).

1159263161 is an equidigital number, since it uses as much as digits as its factorization.

1159263161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165609030.

The product of its digits is 9720, while the sum is 35.

The square root of 1159263161 is about 34047.9538445411. The cubic root of 1159263161 is about 1050.4950533284.

The spelling of 1159263161 in words is "one billion, one hundred fifty-nine million, two hundred sixty-three thousand, one hundred sixty-one".