1398735 has 32 divisors (see below), whose sum is σ = 2681280. Its totient is φ = 687744.

The previous prime is 1398731. The next prime is 1398737. The reversal of 1398735 is 5378931.

It is not a de Polignac number, because 1398735 - 2² = 1398731 is a prime.

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 1398735.

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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1357 + ... + 2153.

It is an arithmetic number, because the mean of its divisors is an integer number (83790).

2^1398735 is an apocalyptic number.

1398735 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1398735 is a deficient number, since it is larger than the sum of its proper divisors (1282545).

1398735 is a wasteful number, since it uses less digits than its factorization.

1398735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 818 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 1398735 is about 1182.6812757459. The cubic root of 1398735 is about 111.8351902093.

The spelling of 1398735 in words is "one million, three hundred ninety-eight thousand, seven hundred thirty-five".