1158822 has 48 divisors (see below), whose sum is σ = 3043872. Its totient is φ = 311040.

The previous prime is 1158821. The next prime is 1158823. The reversal of 1158822 is 2288511.

It is an interprime number because it is at equal distance from previous prime (1158821) and next prime (1158823).

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 (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1872 + ... + 2412.

It is an arithmetic number, because the mean of its divisors is an integer number (63414).

2^1158822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1158822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1521936).

1158822 is an abundant number, since it is smaller than the sum of its proper divisors (1885050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1158822 is a wasteful number, since it uses less digits than its factorization.

1158822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 570 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 1158822 is about 1076.4859497457. The cubic root of 1158822 is about 105.0361780095.

The spelling of 1158822 in words is "one million, one hundred fifty-eight thousand, eight hundred twenty-two".