1121603 has 8 divisors (see below), whose sum is σ = 1291008. Its totient is φ = 954504.

The previous prime is 1121599. The next prime is 1121621. The reversal of 1121603 is 3061211.

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 1121603 - 2² = 1121599 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121693) 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, 650 + ... + 1632.

It is an arithmetic number, because the mean of its divisors is an integer number (161376).

2^1121603 is an apocalyptic number.

1121603 is a deficient number, since it is larger than the sum of its proper divisors (169405).

1121603 is an equidigital number, since it uses as much as digits as its factorization.

1121603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1121603 is about 1059.0575999444. The cubic root of 1121603 is about 103.8994034666.

Adding to 1121603 its reverse (3061211), we get a palindrome (4182814).

The spelling of 1121603 in words is "one million, one hundred twenty-one thousand, six hundred three".