1204816 has 20 divisors (see below), whose sum is σ = 2351412. Its totient is φ = 598016.

The previous prime is 1204813. The next prime is 1204823. The reversal of 1204816 is 6184021.

It can be written as a sum of positive squares in 2 ways, for example, as 1166400 + 38416 = 1080^2 + 196^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3966 + ... + 4258.

2^1204816 is an apocalyptic number.

1204816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1204816 is a deficient number, since it is larger than the sum of its proper divisors (1146596).

1204816 is a wasteful number, since it uses less digits than its factorization.

1204816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1204816 is about 1097.6411071020. The cubic root of 1204816 is about 106.4078272645.

Adding to 1204816 its reverse (6184021), we get a palindrome (7388837).

The spelling of 1204816 in words is "one million, two hundred four thousand, eight hundred sixteen".