1398118 has 4 divisors (see below), whose sum is σ = 2097180. Its totient is φ = 699058.

The previous prime is 1398113. The next prime is 1398121. The reversal of 1398118 is 8118931.

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

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1398118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398113) 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 as a sum of consecutive naturals, namely, 349528 + ... + 349531.

It is an arithmetic number, because the mean of its divisors is an integer number (524295).

2^1398118 is an apocalyptic number.

1398118 is a deficient number, since it is larger than the sum of its proper divisors (699062).

1398118 is an equidigital number, since it uses as much as digits as its factorization.

1398118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699061.

The product of its digits is 1728, while the sum is 31.

The square root of 1398118 is about 1182.4203990121. The cubic root of 1398118 is about 111.8187438105.

The spelling of 1398118 in words is "one million, three hundred ninety-eight thousand, one hundred eighteen".