1420218 has 12 divisors (see below), whose sum is σ = 3077178. Its totient is φ = 473400.

The previous prime is 1420207. The next prime is 1420253. The reversal of 1420218 is 8120241.

It can be written as a sum of positive squares in only one way, i.e., 1292769 + 127449 = 1137^2 + 357^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 78901 = 1420218 / (1 + 4 + 2 + 0 + 2 + 1 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 1420218.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39433 + ... + 39468.

2^1420218 is an apocalyptic number.

1420218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1420218 is an abundant number, since it is smaller than the sum of its proper divisors (1656960).

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

1420218 is a wasteful number, since it uses less digits than its factorization.

1420218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78909 (or 78906 counting only the distinct ones).

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

The square root of 1420218 is about 1191.7289960389. The cubic root of 1420218 is about 112.4048380452.

Adding to 1420218 its reverse (8120241), we get a palindrome (9540459).

The spelling of 1420218 in words is "one million, four hundred twenty thousand, two hundred eighteen".