891275 has 24 divisors (see below), whose sum is σ = 1380864. Its totient is φ = 554400.

The previous prime is 891251. The next prime is 891277. The reversal of 891275 is 572198.

It is not a de Polignac number, because 891275 - 2¹⁴ = 874891 is a prime.

It is a super-2 number, since 2×891275² = 1588742251250, which contains 22 as substring.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

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 23 ways as a sum of consecutive naturals, for example, 1694 + ... + 2156.

It is an arithmetic number, because the mean of its divisors is an integer number (57536).

2⁸⁹¹²⁷⁵ is an apocalyptic number.

891275 is a deficient number, since it is larger than the sum of its proper divisors (489589).

891275 is a wasteful number, since it uses less digits than its factorization.

891275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 486 counting only the distinct ones).

The product of its digits is 5040, while the sum is 32.

The square root of 891275 is about 944.0736200106. The cubic root of 891275 is about 96.2359286789.

It can be divided in two parts, 891 and 275, that multiplied together give a square (245025 = 495²).

The spelling of 891275 in words is "eight hundred ninety-one thousand, two hundred seventy-five".