201603 has 16 divisors (see below), whose sum is σ = 293760. Its totient is φ = 122496.

The previous prime is 201599. The next prime is 201611. The reversal of 201603 is 306102.

It is not a de Polignac number, because 201603 - 2² = 201599 is a prime.

201603 is a modest number, since divided by 603 gives 201 as remainder.

It is not an unprimeable number, because it can be changed into a prime (201623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2976 + ... + 3042.

It is an arithmetic number, because the mean of its divisors is an integer number (18360).

2²⁰¹⁶⁰³ is an apocalyptic number.

201603 is a deficient number, since it is larger than the sum of its proper divisors (92157).

201603 is a wasteful number, since it uses less digits than its factorization.

201603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 201603 is about 449.0022271660. The cubic root of 201603 is about 58.6361792063.

Adding to 201603 its reverse (306102), we get a palindrome (507705).

The spelling of 201603 in words is "two hundred one thousand, six hundred three".