1031603 has 6 divisors (see below), whose sum is σ = 1056276. Its totient is φ = 1007492.

The previous prime is 1031593. The next prime is 1031609. The reversal of 1031603 is 3061301.

It is not a de Polignac number, because 1031603 - 2⁸ = 1031347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1031609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1976 + ... + 2442.

It is an arithmetic number, because the mean of its divisors is an integer number (176046).

2^1031603 is an apocalyptic number.

1031603 is a deficient number, since it is larger than the sum of its proper divisors (24673).

1031603 is an frugal number, since it uses more digits than its factorization.

1031603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 1031603 is about 1015.6785908938. The cubic root of 1031603 is about 101.0425269397.

Adding to 1031603 its reverse (3061301), we get a palindrome (4092904).

It can be divided in two parts, 10 and 31603, that added together give a palindrome (31613).

The spelling of 1031603 in words is "one million, thirty-one thousand, six hundred three".