891441 has 12 divisors (see below), whose sum is σ = 1322932. Its totient is φ = 578016.

The previous prime is 891439. The next prime is 891481. The reversal of 891441 is 144198.

891441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 360000 + 531441 = 600^2 + 729^2 .

It is not a de Polignac number, because 891441 - 2¹ = 891439 is a prime.

It is a Duffinian number.

It is a Curzon number.

891441 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (891421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1006 + ... + 1671.

2⁸⁹¹⁴⁴¹ is an apocalyptic number.

It is an amenable number.

891441 is a deficient number, since it is larger than the sum of its proper divisors (431491).

891441 is a wasteful number, since it uses less digits than its factorization.

891441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2720 (or 2717 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 891441 is about 944.1615327898. The cubic root of 891441 is about 96.2419029563.

The spelling of 891441 in words is "eight hundred ninety-one thousand, four hundred forty-one".