1398271 has 4 divisors (see below), whose sum is σ = 1598032. Its totient is φ = 1198512.

The previous prime is 1398269. The next prime is 1398281. The reversal of 1398271 is 1728931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1728931 = 1109 ⋅1559.

It is not a de Polignac number, because 1398271 - 2¹ = 1398269 is a prime.

It is a Duffinian number.

It is a plaindrome in base 4 and base 16.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99870 + ... + 99883.

It is an arithmetic number, because the mean of its divisors is an integer number (399508).

2^1398271 is an apocalyptic number.

1398271 is a deficient number, since it is larger than the sum of its proper divisors (199761).

1398271 is an equidigital number, since it uses as much as digits as its factorization.

1398271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199760.

The product of its digits is 3024, while the sum is 31.

The square root of 1398271 is about 1182.4850950435. The cubic root of 1398271 is about 111.8228225420.

The spelling of 1398271 in words is "one million, three hundred ninety-eight thousand, two hundred seventy-one".