1158108961 has 3 divisors (see below), whose sum is σ = 1158142993. Its totient is φ = 1158074930.

The previous prime is 1158108911. The next prime is 1158108979. The reversal of 1158108961 is 1698018511.

The square root of 1158108961 is 34031.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1158108961 - 2¹⁷ = 1157977889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1158108911) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 17016 + ... + 51046.

Almost surely, 2^1158108961 is an apocalyptic number.

1158108961 is the 34031-st square number.

1158108961 is the 17016-th centered octagonal number.

It is an amenable number.

1158108961 is a deficient number, since it is larger than the sum of its proper divisors (34032).

1158108961 is an frugal number, since it uses more digits than its factorization.

1158108961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68062 (or 34031 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 40.

The cubic root of 1158108961 is about 1050.1463019119.

The spelling of 1158108961 in words is "one billion, one hundred fifty-eight million, one hundred eight thousand, nine hundred sixty-one".