1240218 has 64 divisors (see below), whose sum is σ = 3352320. Its totient is φ = 331776.

The previous prime is 1240207. The next prime is 1240219. The reversal of 1240218 is 8120421.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1240218.

It is not an unprimeable number, because it can be changed into a prime (1240219) 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 31 ways as a sum of consecutive naturals, for example, 6330 + ... + 6522.

It is an arithmetic number, because the mean of its divisors is an integer number (52380).

2^1240218 is an apocalyptic number.

1240218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1676160).

1240218 is an abundant number, since it is smaller than the sum of its proper divisors (2112102).

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

1240218 is a wasteful number, since it uses less digits than its factorization.

1240218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 222 counting only the distinct ones).

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

The square root of 1240218 is about 1113.6507531538. The cubic root of 1240218 is about 107.4400025763.

Adding to 1240218 its reverse (8120421), we get a palindrome (9360639).

The spelling of 1240218 in words is "one million, two hundred forty thousand, two hundred eighteen".