1165003 has 4 divisors (see below), whose sum is σ = 1331440. Its totient is φ = 998568.

The previous prime is 1165001. The next prime is 1165037. The reversal of 1165003 is 3005611.

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 1165003 - 2¹ = 1165001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83208 + ... + 83221.

It is an arithmetic number, because the mean of its divisors is an integer number (332860).

2^1165003 is an apocalyptic number.

1165003 is a deficient number, since it is larger than the sum of its proper divisors (166437).

1165003 is an equidigital number, since it uses as much as digits as its factorization.

1165003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166436.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 1165003 is about 1079.3530469684. The cubic root of 1165003 is about 105.2225965522. Note that the first 3 decimals are identical.

The spelling of 1165003 in words is "one million, one hundred sixty-five thousand, three".