1158993 has 24 divisors (see below), whose sum is σ = 1909440. Its totient is φ = 670560.

The previous prime is 1158991. The next prime is 1159001. The reversal of 1158993 is 3998511.

It is a happy number.

It is not a de Polignac number, because 1158993 - 2¹ = 1158991 is a prime.

1158993 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1158991) 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 23 ways as a sum of consecutive naturals, for example, 2023 + ... + 2531.

It is an arithmetic number, because the mean of its divisors is an integer number (79560).

2^1158993 is an apocalyptic number.

It is an amenable number.

1158993 is a deficient number, since it is larger than the sum of its proper divisors (750447).

1158993 is a wasteful number, since it uses less digits than its factorization.

1158993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 546 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1158993 is about 1076.5653719120. The cubic root of 1158993 is about 105.0413442626.

The spelling of 1158993 in words is "one million, one hundred fifty-eight thousand, nine hundred ninety-three".