971881 has 8 divisors (see below), whose sum is σ = 1016064. Its totient is φ = 928560.

The previous prime is 971863. The next prime is 971899. The reversal of 971881 is 188179.

971881 is nontrivially palindromic in base 3.

It is an interprime number because it is at equal distance from previous prime (971863) and next prime (971899).

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 971881 - 2⁷ = 971753 is a prime.

It is a super-2 number, since 2×971881² = 1889105356322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971821) 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, 3171 + ... + 3463.

It is an arithmetic number, because the mean of its divisors is an integer number (127008).

2⁹⁷¹⁸⁸¹ is an apocalyptic number.

971881 is the 624-th centered pentagonal number.

It is an amenable number.

971881 is a deficient number, since it is larger than the sum of its proper divisors (44183).

971881 is a wasteful number, since it uses less digits than its factorization.

971881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431.

The product of its digits is 4032, while the sum is 34.

The square root of 971881 is about 985.8402507506. The cubic root of 971881 is about 99.0537748189.

The spelling of 971881 in words is "nine hundred seventy-one thousand, eight hundred eighty-one".