891271 has 8 divisors (see below), whose sum is σ = 954800. Its totient is φ = 829440.

The previous prime is 891251. The next prime is 891277. The reversal of 891271 is 172198.

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

It is a 11-Lehmer number, since φ(891271) divides (891271-1)¹¹.

It is a cyclic number.

It is not a de Polignac number, because 891271 - 2⁵ = 891239 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891277) 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, 775 + ... + 1543.

It is an arithmetic number, because the mean of its divisors is an integer number (119350).

2⁸⁹¹²⁷¹ is an apocalyptic number.

891271 is a deficient number, since it is larger than the sum of its proper divisors (63529).

891271 is a wasteful number, since it uses less digits than its factorization.

891271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849.

The product of its digits is 1008, while the sum is 28.

The square root of 891271 is about 944.0715015294. The cubic root of 891271 is about 96.2357847112.

The spelling of 891271 in words is "eight hundred ninety-one thousand, two hundred seventy-one".