1971271 has 4 divisors (see below), whose sum is σ = 1982344. Its totient is φ = 1960200.

The previous prime is 1971253. The next prime is 1971289. The reversal of 1971271 is 1721791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1721791 = 769 ⋅2239.

It is an interprime number because it is at equal distance from previous prime (1971253) and next prime (1971289).

It is a cyclic number.

It is not a de Polignac number, because 1971271 - 2⁷ = 1971143 is a prime.

It is a Duffinian number.

1971271 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971241) 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, 5265 + ... + 5626.

It is an arithmetic number, because the mean of its divisors is an integer number (495586).

2^1971271 is an apocalyptic number.

1971271 is a deficient number, since it is larger than the sum of its proper divisors (11073).

1971271 is a wasteful number, since it uses less digits than its factorization.

1971271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11072.

The product of its digits is 882, while the sum is 28.

The square root of 1971271 is about 1404.0195867580. The cubic root of 1971271 is about 125.3859219544.

The spelling of 1971271 in words is "one million, nine hundred seventy-one thousand, two hundred seventy-one".