1158779 has 4 divisors (see below), whose sum is σ = 1169520. Its totient is φ = 1148040.

The previous prime is 1158769. The next prime is 1158799. The reversal of 1158779 is 9778511.

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 1158779 - 2⁸ = 1158523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1158719) 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, 5207 + ... + 5424.

It is an arithmetic number, because the mean of its divisors is an integer number (292380).

2^1158779 is an apocalyptic number.

1158779 is a deficient number, since it is larger than the sum of its proper divisors (10741).

1158779 is a wasteful number, since it uses less digits than its factorization.

1158779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10740.

The product of its digits is 17640, while the sum is 38.

The square root of 1158779 is about 1076.4659771679. The cubic root of 1158779 is about 105.0348788133.

The spelling of 1158779 in words is "one million, one hundred fifty-eight thousand, seven hundred seventy-nine".