1178158971 has 24 divisors (see below), whose sum is σ = 1734330640. Its totient is φ = 710867520.

The previous prime is 1178158967. The next prime is 1178158979. The reversal of 1178158971 is 1798518711.

It is not a de Polignac number, because 1178158971 - 2² = 1178158967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1178158971.

It is not an unprimeable number, because it can be changed into a prime (1178158979) 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 23 ways as a sum of consecutive naturals, for example, 76041 + ... + 90213.

Almost surely, 2^1178158971 is an apocalyptic number.

1178158971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1178158971 is a deficient number, since it is larger than the sum of its proper divisors (556171669).

1178158971 is a wasteful number, since it uses less digits than its factorization.

1178158971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14427 (or 14416 counting only the distinct ones).

The product of its digits is 141120, while the sum is 48.

The square root of 1178158971 is about 34324.3204011383. The cubic root of 1178158971 is about 1056.1719555048.

The spelling of 1178158971 in words is "one billion, one hundred seventy-eight million, one hundred fifty-eight thousand, nine hundred seventy-one".