1398985 has 8 divisors (see below), whose sum is σ = 1918656. Its totient is φ = 959280.

The previous prime is 1398979. The next prime is 1398997. The reversal of 1398985 is 5898931.

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

It is not a de Polignac number, because 1398985 - 2³ = 1398977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19951 + ... + 20020.

It is an arithmetic number, because the mean of its divisors is an integer number (239832).

2^1398985 is an apocalyptic number.

It is an amenable number.

1398985 is a deficient number, since it is larger than the sum of its proper divisors (519671).

1398985 is an equidigital number, since it uses as much as digits as its factorization.

1398985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39983.

The product of its digits is 77760, while the sum is 43.

The square root of 1398985 is about 1182.7869630665. The cubic root of 1398985 is about 111.8418526893.

The spelling of 1398985 in words is "one million, three hundred ninety-eight thousand, nine hundred eighty-five".