1121823 has 8 divisors (see below), whose sum is σ = 1662000. Its totient is φ = 747864.

The previous prime is 1121819. The next prime is 1121831. The reversal of 1121823 is 3281211.

It is not a de Polignac number, because 1121823 - 2² = 1121819 is a prime.

1121823 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1121796 and 1121805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121833) 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 7 ways as a sum of consecutive naturals, for example, 20748 + ... + 20801.

It is an arithmetic number, because the mean of its divisors is an integer number (207750).

2^1121823 is an apocalyptic number.

1121823 is a deficient number, since it is larger than the sum of its proper divisors (540177).

1121823 is an equidigital number, since it uses as much as digits as its factorization.

1121823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41558 (or 41552 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 1121823 is about 1059.1614607792. The cubic root of 1121823 is about 103.9061962368.

The spelling of 1121823 in words is "one million, one hundred twenty-one thousand, eight hundred twenty-three".