971855 has 4 divisors (see below), whose sum is σ = 1166232. Its totient is φ = 777480.

The previous prime is 971851. The next prime is 971857. The reversal of 971855 is 558179.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 971855 - 2² = 971851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971851) 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, 97181 + ... + 97190.

It is an arithmetic number, because the mean of its divisors is an integer number (291558).

2⁹⁷¹⁸⁵⁵ is an apocalyptic number.

971855 is a deficient number, since it is larger than the sum of its proper divisors (194377).

971855 is a wasteful number, since it uses less digits than its factorization.

971855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194376.

The product of its digits is 12600, while the sum is 35.

The square root of 971855 is about 985.8270639417. The cubic root of 971855 is about 99.0528915074.

The spelling of 971855 in words is "nine hundred seventy-one thousand, eight hundred fifty-five".