971865 has 32 divisors (see below), whose sum is σ = 1808640. Its totient is φ = 494208.

The previous prime is 971863. The next prime is 971899. The reversal of 971865 is 568179.

It is not a de Polignac number, because 971865 - 2¹ = 971863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (971863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2949 + ... + 3261.

It is an arithmetic number, because the mean of its divisors is an integer number (56520).

2⁹⁷¹⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

971865 is a deficient number, since it is larger than the sum of its proper divisors (836775).

971865 is a wasteful number, since it uses less digits than its factorization.

971865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 344 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 971865 is about 985.8321358122. The cubic root of 971865 is about 99.0532312444.

The spelling of 971865 in words is "nine hundred seventy-one thousand, eight hundred sixty-five".