2421218 has 4 divisors (see below), whose sum is σ = 3631830. Its totient is φ = 1210608.

The previous prime is 2421203. The next prime is 2421229. The reversal of 2421218 is 8121242.

It is a happy number.

2421218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2411809 + 9409 = 1553^2 + 97^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2421218.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 605303 + ... + 605306.

2^2421218 is an apocalyptic number.

2421218 is a deficient number, since it is larger than the sum of its proper divisors (1210612).

2421218 is a wasteful number, since it uses less digits than its factorization.

2421218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210611.

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

The square root of 2421218 is about 1556.0263493913. The cubic root of 2421218 is about 134.2799893009.

The spelling of 2421218 in words is "two million, four hundred twenty-one thousand, two hundred eighteen".