1158121008 has 90 divisors (see below), whose sum is σ = 3562618332. Its totient is φ = 350940480.

The previous prime is 1158121007. The next prime is 1158121009. The reversal of 1158121008 is 8001218511.

It is an interprime number because it is at equal distance from previous prime (1158121007) and next prime (1158121009).

It is not an unprimeable number, because it can be changed into a prime (1158121007) 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 17 ways as a sum of consecutive naturals, for example, 15810 + ... + 50657.

Almost surely, 2^1158121008 is an apocalyptic number.

1158121008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1158121008 is an abundant number, since it is smaller than the sum of its proper divisors (2404497324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1158121008 is a wasteful number, since it uses less digits than its factorization.

1158121008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66503 (or 66483 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 27.

The square root of 1158121008 is about 34031.1769999217. The cubic root of 1158121008 is about 1050.1499432125.

Adding to 1158121008 its reverse (8001218511), we get a palindrome (9159339519).

The spelling of 1158121008 in words is "one billion, one hundred fifty-eight million, one hundred twenty-one thousand, eight".