400603 has 8 divisors (see below), whose sum is σ = 462080. Its totient is φ = 340200.

The previous prime is 400601. The next prime is 400607. The reversal of 400603 is 306004.

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

It is not a de Polignac number, because 400603 - 2¹ = 400601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 868 + ... + 1246.

It is an arithmetic number, because the mean of its divisors is an integer number (57760).

2⁴⁰⁰⁶⁰³ is an apocalyptic number.

400603 is a deficient number, since it is larger than the sum of its proper divisors (61477).

400603 is a wasteful number, since it uses less digits than its factorization.

400603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 400603 is about 632.9320658649. The cubic root of 400603 is about 73.7176359001.

Adding to 400603 its reverse (306004), we get a palindrome (706607).

The spelling of 400603 in words is "four hundred thousand, six hundred three".