1005389 has 12 divisors (see below), whose sum is σ = 1264032. Its totient is φ = 782760.

The previous prime is 1005373. The next prime is 1005391. The reversal of 1005389 is 9835001.

It is not a de Polignac number, because 1005389 - 2⁴ = 1005373 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254 + ... + 1440.

It is an arithmetic number, because the mean of its divisors is an integer number (105336).

2^1005389 is an apocalyptic number.

It is an amenable number.

1005389 is a deficient number, since it is larger than the sum of its proper divisors (258643).

1005389 is a wasteful number, since it uses less digits than its factorization.

1005389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216 (or 1205 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1005389 is about 1002.6908795835. The cubic root of 1005389 is about 100.1793116146.

The spelling of 1005389 in words is "one million, five thousand, three hundred eighty-nine".