1133821 has 6 divisors (see below), whose sum is σ = 1227930. Its totient is φ = 1046448.

The previous prime is 1133819. The next prime is 1133827. The reversal of 1133821 is 1283311.

It can be written as a sum of positive squares in 3 ways, for example, as 8100 + 1125721 = 90^2 + 1061^2 .

It is not a de Polignac number, because 1133821 - 2¹ = 1133819 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 (1133827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3186 + ... + 3523.

It is an arithmetic number, because the mean of its divisors is an integer number (204655).

2^1133821 is an apocalyptic number.

It is an amenable number.

1133821 is a deficient number, since it is larger than the sum of its proper divisors (94109).

1133821 is an equidigital number, since it uses as much as digits as its factorization.

1133821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6735 (or 6722 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

The square root of 1133821 is about 1064.8103117457. The cubic root of 1133821 is about 104.2753122081.

The spelling of 1133821 in words is "one million, one hundred thirty-three thousand, eight hundred twenty-one".