1982271 has 4 divisors (see below), whose sum is σ = 2643032. Its totient is φ = 1321512.

The previous prime is 1982269. The next prime is 1982273. The reversal of 1982271 is 1722891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1722891 = 3 ⋅574297.

It is an interprime number because it is at equal distance from previous prime (1982269) and next prime (1982273).

It is not a de Polignac number, because 1982271 - 2¹ = 1982269 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982273) 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, 330376 + ... + 330381.

It is an arithmetic number, because the mean of its divisors is an integer number (660758).

2^1982271 is an apocalyptic number.

1982271 is a deficient number, since it is larger than the sum of its proper divisors (660761).

1982271 is an equidigital number, since it uses as much as digits as its factorization.

1982271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660760.

The product of its digits is 2016, while the sum is 30.

The square root of 1982271 is about 1407.9314614000. The cubic root of 1982271 is about 125.6187138262.

The spelling of 1982271 in words is "one million, nine hundred eighty-two thousand, two hundred seventy-one".