1513503 has 12 divisors (see below), whose sum is σ = 2199288. Its totient is φ = 1002960.

The previous prime is 1513489. The next prime is 1513511. The reversal of 1513503 is 3053151.

It is a happy number.

It is not a de Polignac number, because 1513503 - 2⁴ = 1513487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1513543) 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 11 ways as a sum of consecutive naturals, for example, 1501 + ... + 2297.

It is an arithmetic number, because the mean of its divisors is an integer number (183274).

2^1513503 is an apocalyptic number.

1513503 is a deficient number, since it is larger than the sum of its proper divisors (685785).

1513503 is a wasteful number, since it uses less digits than its factorization.

1513503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 1513503 is about 1230.2450975314. The cubic root of 1513503 is about 114.8138892655.

Adding to 1513503 its reverse (3053151), we get a palindrome (4566654).

It can be divided in two parts, 1513 and 503, that added together give a triangular number (2016 = T₆₃).

The spelling of 1513503 in words is "one million, five hundred thirteen thousand, five hundred three".