1158871 has 4 divisors (see below), whose sum is σ = 1324432. Its totient is φ = 993312.

The previous prime is 1158863. The next prime is 1158881. The reversal of 1158871 is 1788511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1158871 - 2³ = 1158863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158821) 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 3 ways as a sum of consecutive naturals, for example, 82770 + ... + 82783.

It is an arithmetic number, because the mean of its divisors is an integer number (331108).

2^1158871 is an apocalyptic number.

1158871 is a deficient number, since it is larger than the sum of its proper divisors (165561).

1158871 is an equidigital number, since it uses as much as digits as its factorization.

1158871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165560.

The product of its digits is 2240, while the sum is 31.

The square root of 1158871 is about 1076.5087087432. The cubic root of 1158871 is about 105.0376584498.

The spelling of 1158871 in words is "one million, one hundred fifty-eight thousand, eight hundred seventy-one".