1398111 has 16 divisors (see below), whose sum is σ = 2190720. Its totient is φ = 781920.

The previous prime is 1398107. The next prime is 1398113. The reversal of 1398111 is 1118931.

It is not a de Polignac number, because 1398111 - 2² = 1398107 is a prime.

It is a plaindrome in base 4 and base 16.

It is a zygodrome in base 4.

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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1201 + ... + 2058.

It is an arithmetic number, because the mean of its divisors is an integer number (136920).

2^1398111 is an apocalyptic number.

1398111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1398111 is a deficient number, since it is larger than the sum of its proper divisors (792609).

1398111 is a wasteful number, since it uses less digits than its factorization.

1398111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286.

The product of its digits is 216, while the sum is 24.

The square root of 1398111 is about 1182.4174389783. The cubic root of 1398111 is about 111.8185571947.

The spelling of 1398111 in words is "one million, three hundred ninety-eight thousand, one hundred eleven".