13503123 has 6 divisors (see below), whose sum is σ = 19504524. Its totient is φ = 9002076.

The previous prime is 13503121. The next prime is 13503137. The reversal of 13503123 is 32130531.

13503123 is a `hidden beast` number, since 1 + 350 + 312 + 3 = 666.

It is not a de Polignac number, because 13503123 - 2¹ = 13503121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13503096 and 13503105.

It is not an unprimeable number, because it can be changed into a prime (13503121) 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 5 ways as a sum of consecutive naturals, for example, 750165 + ... + 750182.

It is an arithmetic number, because the mean of its divisors is an integer number (3250754).

Almost surely, 2^13503123 is an apocalyptic number.

13503123 is a deficient number, since it is larger than the sum of its proper divisors (6001401).

13503123 is a wasteful number, since it uses less digits than its factorization.

13503123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500353 (or 1500350 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 13503123 is about 3674.6595760696. The cubic root of 13503123 is about 238.1285173184.

Adding to 13503123 its reverse (32130531), we get a palindrome (45633654).

The spelling of 13503123 in words is "thirteen million, five hundred three thousand, one hundred twenty-three".