1218204 has 72 divisors (see below), whose sum is σ = 3516240. Its totient is φ = 352512.

The previous prime is 1218199. The next prime is 1218209. The reversal of 1218204 is 4028121.

It is an interprime number because it is at equal distance from previous prime (1218199) and next prime (1218209).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8824 + ... + 8960.

2^1218204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1758120).

1218204 is an abundant number, since it is smaller than the sum of its proper divisors (2298036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1218204 is a wasteful number, since it uses less digits than its factorization.

1218204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1218204 is about 1103.7227912841. The cubic root of 1218204 is about 106.8005134007.

The spelling of 1218204 in words is "one million, two hundred eighteen thousand, two hundred four".