1156118971 has 8 divisors (see below), whose sum is σ = 1325449440. Its totient is φ = 987831168.

The previous prime is 1156118947. The next prime is 1156118987. The reversal of 1156118971 is 1798116511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1156118971 - 2¹³ = 1156110779 is a prime.

It is a super-2 number, since 2×1156118971² = 2673222150212197682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1156118921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258286 + ... + 262723.

It is an arithmetic number, because the mean of its divisors is an integer number (165681180).

Almost surely, 2^1156118971 is an apocalyptic number.

1156118971 is a deficient number, since it is larger than the sum of its proper divisors (169330469).

1156118971 is an equidigital number, since it uses as much as digits as its factorization.

1156118971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521333.

The product of its digits is 15120, while the sum is 40.

The square root of 1156118971 is about 34001.7495285169. The cubic root of 1156118971 is about 1049.5444648317.

The spelling of 1156118971 in words is "one billion, one hundred fifty-six million, one hundred eighteen thousand, nine hundred seventy-one".