1163603 has 6 divisors (see below), whose sum is σ = 1353636. Its totient is φ = 997332.

The previous prime is 1163587. The next prime is 1163609. The reversal of 1163603 is 3063611.

It is not a de Polignac number, because 1163603 - 2⁴ = 1163587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1163609) 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, 11825 + ... + 11922.

It is an arithmetic number, because the mean of its divisors is an integer number (225606).

2^1163603 is an apocalyptic number.

1163603 is a deficient number, since it is larger than the sum of its proper divisors (190033).

1163603 is an equidigital number, since it uses as much as digits as its factorization.

1163603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23761 (or 23754 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1163603 is about 1078.7043153710. The cubic root of 1163603 is about 105.1804305139.

The spelling of 1163603 in words is "one million, one hundred sixty-three thousand, six hundred three".