1143503 has 4 divisors (see below), whose sum is σ = 1145760. Its totient is φ = 1141248.

The previous prime is 1143487. The next prime is 1143529. The reversal of 1143503 is 3053411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3053411 = 23 ⋅132757.

It is a cyclic number.

It is not a de Polignac number, because 1143503 - 2⁴ = 1143487 is a prime.

It is a super-2 number, since 2×1143503² = 2615198222018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143563) 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, 26 + ... + 1512.

It is an arithmetic number, because the mean of its divisors is an integer number (286440).

2^1143503 is an apocalyptic number.

1143503 is a deficient number, since it is larger than the sum of its proper divisors (2257).

1143503 is an equidigital number, since it uses as much as digits as its factorization.

1143503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1143503 is about 1069.3469970033. The cubic root of 1143503 is about 104.5712829122.

Adding to 1143503 its reverse (3053411), we get a palindrome (4196914).

The spelling of 1143503 in words is "one million, one hundred forty-three thousand, five hundred three".