1398001 has 8 divisors (see below), whose sum is σ = 1605600. Its totient is φ = 1203840.

The previous prime is 1397999. The next prime is 1398011. The reversal of 1398001 is 1008931.

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

It is not a de Polignac number, because 1398001 - 2¹ = 1397999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1398011) by changing a digit.

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, 3136 + ... + 3553.

It is an arithmetic number, because the mean of its divisors is an integer number (200700).

2^1398001 is an apocalyptic number.

1398001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1398001 is a deficient number, since it is larger than the sum of its proper divisors (207599).

1398001 is a wasteful number, since it uses less digits than its factorization.

1398001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6719.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1398001 is about 1182.3709231878. The cubic root of 1398001 is about 111.8156245797.

The spelling of 1398001 in words is "one million, three hundred ninety-eight thousand, one".