1398385 has 8 divisors (see below), whose sum is σ = 1685376. Its totient is φ = 1113840.

The previous prime is 1398367. The next prime is 1398401. The reversal of 1398385 is 5838931.

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

It is not a de Polignac number, because 1398385 - 2⁹ = 1397873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1080 + ... + 1990.

It is an arithmetic number, because the mean of its divisors is an integer number (210672).

2^1398385 is an apocalyptic number.

It is an amenable number.

1398385 is a deficient number, since it is larger than the sum of its proper divisors (286991).

1398385 is an equidigital number, since it uses as much as digits as its factorization.

1398385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223.

The product of its digits is 25920, while the sum is 37.

The square root of 1398385 is about 1182.5332976284. The cubic root of 1398385 is about 111.8258614034.

The spelling of 1398385 in words is "one million, three hundred ninety-eight thousand, three hundred eighty-five".