1530503 has 4 divisors (see below), whose sum is σ = 1648248. Its totient is φ = 1412760.

The previous prime is 1530457. The next prime is 1530511. The reversal of 1530503 is 3050351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3050351 = 151 ⋅20201.

It is a cyclic number.

It is not a de Polignac number, because 1530503 - 2¹⁸ = 1268359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1530523) 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, 58853 + ... + 58878.

It is an arithmetic number, because the mean of its divisors is an integer number (412062).

2^1530503 is an apocalyptic number.

1530503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1530503 is a deficient number, since it is larger than the sum of its proper divisors (117745).

1530503 is a wasteful number, since it uses less digits than its factorization.

1530503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117744.

The product of its (nonzero) digits is 225, while the sum is 17.

The square root of 1530503 is about 1237.1349966758. The cubic root of 1530503 is about 115.2421614179.

Adding to 1530503 its reverse (3050351), we get a palindrome (4580854).

The spelling of 1530503 in words is "one million, five hundred thirty thousand, five hundred three".