1242218 has 8 divisors (see below), whose sum is σ = 1908900. Its totient is φ = 605920.

The previous prime is 1242217. The next prime is 1242221. The reversal of 1242218 is 8122421.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1203409 + 38809 = 1097^2 + 197^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1242218.

It is not an unprimeable number, because it can be changed into a prime (1242217) 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 3 ways as a sum of consecutive naturals, for example, 7493 + ... + 7656.

2^1242218 is an apocalyptic number.

1242218 is a deficient number, since it is larger than the sum of its proper divisors (666682).

1242218 is a wasteful number, since it uses less digits than its factorization.

1242218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15192.

The product of its digits is 256, while the sum is 20.

The square root of 1242218 is about 1114.5483390145. The cubic root of 1242218 is about 107.4977248482.

Adding to 1242218 its reverse (8122421), we get a palindrome (9364639).

The spelling of 1242218 in words is "one million, two hundred forty-two thousand, two hundred eighteen".