1005387 has 8 divisors (see below), whose sum is σ = 1350720. Its totient is φ = 665160.

The previous prime is 1005373. The next prime is 1005391. The reversal of 1005387 is 7835001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1005387 - 2⁴ = 1005371 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1005317) 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 7 ways as a sum of consecutive naturals, for example, 789 + ... + 1622.

It is an arithmetic number, because the mean of its divisors is an integer number (168840).

2^1005387 is an apocalyptic number.

1005387 is a deficient number, since it is larger than the sum of its proper divisors (345333).

1005387 is a wasteful number, since it uses less digits than its factorization.

1005387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 1005387 is about 1002.6898822667. The cubic root of 1005387 is about 100.1792451863.

The spelling of 1005387 in words is "one million, five thousand, three hundred eighty-seven".