1285889 has 12 divisors (see below), whose sum is σ = 1463280. Its totient is φ = 1120560.

The previous prime is 1285877. The next prime is 1285891. The reversal of 1285889 is 9885821.

It is not a de Polignac number, because 1285889 - 2⁸ = 1285633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285859) 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, 9182 + ... + 9320.

It is an arithmetic number, because the mean of its divisors is an integer number (121940).

2^1285889 is an apocalyptic number.

It is an amenable number.

1285889 is a deficient number, since it is larger than the sum of its proper divisors (177391).

1285889 is a wasteful number, since it uses less digits than its factorization.

1285889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 179 counting only the distinct ones).

The product of its digits is 46080, while the sum is 41.

The square root of 1285889 is about 1133.9704581690. The cubic root of 1285889 is about 108.7429625076.

The spelling of 1285889 in words is "one million, two hundred eighty-five thousand, eight hundred eighty-nine".