1104821 has 2 divisors, whose sum is σ = 1104822. Its totient is φ = 1104820.

The previous prime is 1104811. The next prime is 1104823. The reversal of 1104821 is 1284011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 662596 + 442225 = 814^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 1104821 - 2¹⁰ = 1103797 is a prime.

Together with 1104823, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1104821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1104823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552410 + 552411.

It is an arithmetic number, because the mean of its divisors is an integer number (552411).

2^1104821 is an apocalyptic number.

It is an amenable number.

1104821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1104821 is an equidigital number, since it uses as much as digits as its factorization.

1104821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1104821 is about 1051.1046570157. The cubic root of 1104821 is about 103.3785985061.

Adding to 1104821 its reverse (1284011), we get a palindrome (2388832).

The spelling of 1104821 in words is "one million, one hundred four thousand, eight hundred twenty-one".