1398734 has 4 divisors (see below), whose sum is σ = 2098104. Its totient is φ = 699366.

The previous prime is 1398731. The next prime is 1398737. The reversal of 1398734 is 4378931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4378931 = 137 ⋅31963.

It is an interprime number because it is at equal distance from previous prime (1398731) and next prime (1398737).

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1398694 and 1398703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398731) 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 as a sum of consecutive naturals, namely, 349682 + ... + 349685.

It is an arithmetic number, because the mean of its divisors is an integer number (524526).

2^1398734 is an apocalyptic number.

1398734 is a deficient number, since it is larger than the sum of its proper divisors (699370).

1398734 is an equidigital number, since it uses as much as digits as its factorization.

1398734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699369.

The product of its digits is 18144, while the sum is 35.

The square root of 1398734 is about 1182.6808529777. The cubic root of 1398734 is about 111.8351635577.

The spelling of 1398734 in words is "one million, three hundred ninety-eight thousand, seven hundred thirty-four".