1303523 has 4 divisors (see below), whose sum is σ = 1403808. Its totient is φ = 1203240.

The previous prime is 1303517. The next prime is 1303537. The reversal of 1303523 is 3253031.

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 1303523 - 2⁴ = 1303507 is a prime.

It is a Duffinian number.

1303523 is a modest number, since divided by 3523 gives 13 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1303553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50123 + ... + 50148.

It is an arithmetic number, because the mean of its divisors is an integer number (350952).

2^1303523 is an apocalyptic number.

1303523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1303523 is a deficient number, since it is larger than the sum of its proper divisors (100285).

1303523 is a wasteful number, since it uses less digits than its factorization.

1303523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100284.

The product of its (nonzero) digits is 270, while the sum is 17.

The square root of 1303523 is about 1141.7193175207. The cubic root of 1303523 is about 109.2377885382.

Adding to 1303523 its reverse (3253031), we get a palindrome (4556554).

The spelling of 1303523 in words is "one million, three hundred three thousand, five hundred twenty-three".