1218424 has 32 divisors (see below), whose sum is σ = 2505600. Its totient is φ = 554880.

The previous prime is 1218421. The next prime is 1218433. The reversal of 1218424 is 4248121.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1218395 and 1218404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218421) 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 in 7 ways as a sum of consecutive naturals, for example, 39289 + ... + 39319.

It is an arithmetic number, because the mean of its divisors is an integer number (78300).

2^1218424 is an apocalyptic number.

It is an amenable number.

1218424 is an abundant number, since it is smaller than the sum of its proper divisors (1287176).

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

1218424 is an equidigital number, since it uses as much as digits as its factorization.

1218424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 50 counting only the distinct ones).

The product of its digits is 512, while the sum is 22.

The square root of 1218424 is about 1103.8224494909. The cubic root of 1218424 is about 106.8069421813.

The spelling of 1218424 in words is "one million, two hundred eighteen thousand, four hundred twenty-four".