1145603 has 4 divisors (see below), whose sum is σ = 1165080. Its totient is φ = 1126128.

The previous prime is 1145593. The next prime is 1145611. The reversal of 1145603 is 3065411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1145603 - 2⁶ = 1145539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9650 + ... + 9767.

It is an arithmetic number, because the mean of its divisors is an integer number (291270).

2^1145603 is an apocalyptic number.

1145603 is a deficient number, since it is larger than the sum of its proper divisors (19477).

1145603 is an equidigital number, since it uses as much as digits as its factorization.

1145603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19476.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1145603 is about 1070.3284542607. The cubic root of 1145603 is about 104.6352575009.

The spelling of 1145603 in words is "one million, one hundred forty-five thousand, six hundred three".