406603 has 4 divisors (see below), whose sum is σ = 407880. Its totient is φ = 405328.

The previous prime is 406591. The next prime is 406631. The reversal of 406603 is 306604.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 406603 - 2¹⁷ = 275531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288 + ... + 946.

It is an arithmetic number, because the mean of its divisors is an integer number (101970).

2⁴⁰⁶⁶⁰³ is an apocalyptic number.

406603 is a deficient number, since it is larger than the sum of its proper divisors (1277).

406603 is an equidigital number, since it uses as much as digits as its factorization.

406603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 406603 is about 637.6542950534. The cubic root of 406603 is about 74.0838470099.

Subtracting from 406603 its reverse (306604), we obtain a palindrome (99999).

The spelling of 406603 in words is "four hundred six thousand, six hundred three".