1402218 has 32 divisors (see below), whose sum is σ = 3254400. Its totient is φ = 446688.

The previous prime is 1402201. The next prime is 1402231. The reversal of 1402218 is 8122041.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1402218.

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 in 15 ways as a sum of consecutive naturals, for example, 678 + ... + 1806.

It is an arithmetic number, because the mean of its divisors is an integer number (101700).

2^1402218 is an apocalyptic number.

1402218 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 1402218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1627200).

1402218 is an abundant number, since it is smaller than the sum of its proper divisors (1852182).

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

1402218 is a wasteful number, since it uses less digits than its factorization.

1402218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163 (or 1157 counting only the distinct ones).

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

The square root of 1402218 is about 1184.1528617539. The cubic root of 1402218 is about 111.9279404674.

Adding to 1402218 its reverse (8122041), we get a palindrome (9524259).

The spelling of 1402218 in words is "one million, four hundred two thousand, two hundred eighteen".