1005390 has 24 divisors (see below), whose sum is σ = 2614248. Its totient is φ = 268080.

The previous prime is 1005373. The next prime is 1005391. The reversal of 1005390 is 935001.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005391) 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, 5496 + ... + 5675.

It is an arithmetic number, because the mean of its divisors is an integer number (108927).

2^1005390 is an apocalyptic number.

1005390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1005390 is an abundant number, since it is smaller than the sum of its proper divisors (1608858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1005390 is a wasteful number, since it uses less digits than its factorization.

1005390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11184 (or 11181 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 1005390 is about 1002.6913782416. The cubic root of 1005390 is about 100.1793448287.

1005390 divided by its sum of digits (18) gives a palindrome (55855).

The spelling of 1005390 in words is "one million, five thousand, three hundred ninety".