1971171 has 6 divisors (see below), whose sum is σ = 2847260. Its totient is φ = 1314108.

The previous prime is 1971161. The next prime is 1971181. The reversal of 1971171 is 1711791.

It is an interprime number because it is at equal distance from previous prime (1971161) and next prime (1971181).

It is not a de Polignac number, because 1971171 - 2⁶ = 1971107 is a prime.

It is a super-2 number, since 2×1971171² = 7771030222482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1971161) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109501 + ... + 109518.

2^1971171 is an apocalyptic number.

1971171 is a deficient number, since it is larger than the sum of its proper divisors (876089).

1971171 is a wasteful number, since it uses less digits than its factorization.

1971171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219025 (or 219022 counting only the distinct ones).

The product of its digits is 441, while the sum is 27.

The square root of 1971171 is about 1403.9839742675. The cubic root of 1971171 is about 125.3838016973.

The spelling of 1971171 in words is "one million, nine hundred seventy-one thousand, one hundred seventy-one".