1398685 has 8 divisors (see below), whose sum is σ = 1766880. Its totient is φ = 1059984.

The previous prime is 1398667. The next prime is 1398701. The reversal of 1398685 is 5868931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1398685 - 2⁷ = 1398557 is a prime.

1398685 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7267 + ... + 7456.

It is an arithmetic number, because the mean of its divisors is an integer number (220860).

2^1398685 is an apocalyptic number.

It is an amenable number.

1398685 is a deficient number, since it is larger than the sum of its proper divisors (368195).

1398685 is a wasteful number, since it uses less digits than its factorization.

1398685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14747.

The product of its digits is 51840, while the sum is 40.

The square root of 1398685 is about 1182.6601371485. The cubic root of 1398685 is about 111.8338576180.

The spelling of 1398685 in words is "one million, three hundred ninety-eight thousand, six hundred eighty-five".