1398106 has 4 divisors (see below), whose sum is σ = 2097162. Its totient is φ = 699052.

The previous prime is 1398091. The next prime is 1398107. The reversal of 1398106 is 6018931.

It is a happy number.

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., 982081 + 416025 = 991^2 + 645^2 .

It is a plaindrome in base 4 and base 16.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (1398107) 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, 349525 + ... + 349528.

2^1398106 is an apocalyptic number.

1398106 is a deficient number, since it is larger than the sum of its proper divisors (699056).

1398106 is an equidigital number, since it uses as much as digits as its factorization.

1398106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699055.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1398106 is about 1182.4153246639. The cubic root of 1398106 is about 111.8184238974.

The spelling of 1398106 in words is "one million, three hundred ninety-eight thousand, one hundred six".