1398005 has 16 divisors (see below), whose sum is σ = 1952640. Its totient is φ = 940992.

The previous prime is 1397999. The next prime is 1398011. The reversal of 1398005 is 5008931.

It is an interprime number because it is at equal distance from previous prime (1397999) and next prime (1398011).

It is a cyclic number.

It is not a de Polignac number, because 1398005 - 2⁴ = 1397989 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1727 + ... + 2403.

It is an arithmetic number, because the mean of its divisors is an integer number (122040).

2^1398005 is an apocalyptic number.

It is an amenable number.

1398005 is a deficient number, since it is larger than the sum of its proper divisors (554635).

1398005 is an equidigital number, since it uses as much as digits as its factorization.

1398005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1398005 is about 1182.3726147032. The cubic root of 1398005 is about 111.8157312230.

The spelling of 1398005 in words is "one million, three hundred ninety-eight thousand, five".