1998271 has 8 divisors (see below), whose sum is σ = 2217600. Its totient is φ = 1785240.

The previous prime is 1998257. The next prime is 1998277. The reversal of 1998271 is 1728991.

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

It is a cyclic number.

It is not a de Polignac number, because 1998271 - 2¹¹ = 1996223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1998271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 891 + ... + 2188.

It is an arithmetic number, because the mean of its divisors is an integer number (277200).

2^1998271 is an apocalyptic number.

1998271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1998271 is a deficient number, since it is larger than the sum of its proper divisors (219329).

1998271 is a wasteful number, since it uses less digits than its factorization.

1998271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3149.

The product of its digits is 9072, while the sum is 37.

The square root of 1998271 is about 1413.6021363877. The cubic root of 1998271 is about 125.9557877972.

The spelling of 1998271 in words is "one million, nine hundred ninety-eight thousand, two hundred seventy-one".