1163821 has 2 divisors, whose sum is σ = 1163822. Its totient is φ = 1163820.

The previous prime is 1163791. The next prime is 1163831. The reversal of 1163821 is 1283611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 741321 + 422500 = 861^2 + 650^2 .

It is a cyclic number.

It is not a de Polignac number, because 1163821 - 2¹³ = 1155629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1163792 and 1163801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1163831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581910 + 581911.

It is an arithmetic number, because the mean of its divisors is an integer number (581911).

2^1163821 is an apocalyptic number.

It is an amenable number.

1163821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1163821 is an equidigital number, since it uses as much as digits as its factorization.

1163821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 22.

The square root of 1163821 is about 1078.8053577917. The cubic root of 1163821 is about 105.1869985908.

The spelling of 1163821 in words is "one million, one hundred sixty-three thousand, eight hundred twenty-one".