1218304 has 18 divisors (see below), whose sum is σ = 2432360. Its totient is φ = 609024.

The previous prime is 1218281. The next prime is 1218307. The reversal of 1218304 is 4038121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218307) 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 as a sum of consecutive naturals, namely, 2124 + ... + 2635.

2^1218304 is an apocalyptic number.

It is an amenable number.

1218304 is a deficient number, since it is larger than the sum of its proper divisors (1214056).

1218304 is an frugal number, since it uses more digits than its factorization.

1218304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4775 (or 4761 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1218304 is about 1103.7680915845. The cubic root of 1218304 is about 106.8034356697.

The spelling of 1218304 in words is "one million, two hundred eighteen thousand, three hundred four".