971861 has 8 divisors (see below), whose sum is σ = 1080864. Its totient is φ = 866320.

The previous prime is 971857. The next prime is 971863. The reversal of 971861 is 168179.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 971861 - 2² = 971857 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 251 + ... + 1416.

It is an arithmetic number, because the mean of its divisors is an integer number (135108).

2⁹⁷¹⁸⁶¹ is an apocalyptic number.

It is an amenable number.

971861 is a deficient number, since it is larger than the sum of its proper divisors (109003).

971861 is a wasteful number, since it uses less digits than its factorization.

971861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731.

The product of its digits is 3024, while the sum is 32.

The square root of 971861 is about 985.8301070671. The cubic root of 971861 is about 99.0530953499.

It can be divided in two parts, 9718 and 61, that added together give a palindrome (9779).

The spelling of 971861 in words is "nine hundred seventy-one thousand, eight hundred sixty-one".