971181 has 18 divisors (see below), whose sum is σ = 1475370. Its totient is φ = 614880.

The previous prime is 971177. The next prime is 971197. The reversal of 971181 is 181179.

It can be written as a sum of positive squares in 3 ways, for example, as 38025 + 933156 = 195^2 + 966^2 .

It is not a de Polignac number, because 971181 - 2² = 971177 is a prime.

It is a super-2 number, since 2×971181² = 1886385069522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971111) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15891 + ... + 15951.

It is an arithmetic number, because the mean of its divisors is an integer number (81965).

2⁹⁷¹¹⁸¹ is an apocalyptic number.

It is an amenable number.

971181 is a deficient number, since it is larger than the sum of its proper divisors (504189).

971181 is a wasteful number, since it uses less digits than its factorization.

971181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 93 counting only the distinct ones).

The product of its digits is 504, while the sum is 27.

The square root of 971181 is about 985.4851597056. The cubic root of 971181 is about 99.0299878546.

The spelling of 971181 in words is "nine hundred seventy-one thousand, one hundred eighty-one".