1123603 has 8 divisors (see below), whose sum is σ = 1274000. Its totient is φ = 982368.

The previous prime is 1123601. The next prime is 1123621. The reversal of 1123603 is 3063211.

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

It is a cyclic number.

It is not a de Polignac number, because 1123603 - 2¹ = 1123601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1123601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2028 + ... + 2521.

It is an arithmetic number, because the mean of its divisors is an integer number (159250).

2^1123603 is an apocalyptic number.

1123603 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1123603 is a deficient number, since it is larger than the sum of its proper divisors (150397).

1123603 is a wasteful number, since it uses less digits than its factorization.

1123603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4581.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1123603 is about 1060.0014150934. The cubic root of 1123603 is about 103.9611232896.

Adding to 1123603 its reverse (3063211), we get a palindrome (4186814).

The spelling of 1123603 in words is "one million, one hundred twenty-three thousand, six hundred three".