1003406 has 4 divisors (see below), whose sum is σ = 1505112. Its totient is φ = 501702.

The previous prime is 1003397. The next prime is 1003411. The reversal of 1003406 is 6043001.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 250850 + ... + 250853.

It is an arithmetic number, because the mean of its divisors is an integer number (376278).

2^1003406 is an apocalyptic number.

1003406 is a deficient number, since it is larger than the sum of its proper divisors (501706).

1003406 is an equidigital number, since it uses as much as digits as its factorization.

1003406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501705.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1003406 is about 1001.7015523598. The cubic root of 1003406 is about 100.1134046785.

Adding to 1003406 its reverse (6043001), we get a palindrome (7046407).

The spelling of 1003406 in words is "one million, three thousand, four hundred six".