1821104 has 10 divisors (see below), whose sum is σ = 3528420. Its totient is φ = 910544.

The previous prime is 1821101. The next prime is 1821107. The reversal of 1821104 is 4011281.

It is an interprime number because it is at equal distance from previous prime (1821101) and next prime (1821107).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1821101) 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 as a sum of consecutive naturals, namely, 56894 + ... + 56925.

It is an arithmetic number, because the mean of its divisors is an integer number (352842).

2^1821104 is an apocalyptic number.

It is an amenable number.

1821104 is a deficient number, since it is larger than the sum of its proper divisors (1707316).

1821104 is a wasteful number, since it uses less digits than its factorization.

1821104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113827 (or 113821 counting only the distinct ones).

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

The square root of 1821104 is about 1349.4828639149. The cubic root of 1821104 is about 122.1175969038.

Adding to 1821104 its reverse (4011281), we get a palindrome (5832385).

The spelling of 1821104 in words is "one million, eight hundred twenty-one thousand, one hundred four".