890001 has 32 divisors (see below), whose sum is σ = 1601280. Its totient is φ = 476928.

The previous prime is 889997. The next prime is 890003. The reversal of 890001 is 100098.

It is not a de Polignac number, because 890001 - 2² = 889997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (890003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3075 + ... + 3351.

It is an arithmetic number, because the mean of its divisors is an integer number (50040).

2⁸⁹⁰⁰⁰¹ is an apocalyptic number.

It is an amenable number.

890001 is a deficient number, since it is larger than the sum of its proper divisors (711279).

890001 is a wasteful number, since it uses less digits than its factorization.

890001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 890001 is about 943.3986432045. The cubic root of 890001 is about 96.1900531870.

Adding to 890001 its reverse (100098), we get a palindrome (990099).

It can be divided in two parts, 8 and 90001, that added together give a palindrome (90009).

The spelling of 890001 in words is "eight hundred ninety thousand, one".