13123520 has 28 divisors (see below), whose sum is σ = 31251144. Its totient is φ = 5249280.

The previous prime is 13123463. The next prime is 13123529. The reversal of 13123520 is 2532131.

13123520 is nontrivially palindromic in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123529) 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 3 ways as a sum of consecutive naturals, for example, 20186 + ... + 20825.

Almost surely, 2^13123520 is an apocalyptic number.

13123520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13123520 is an abundant number, since it is smaller than the sum of its proper divisors (18127624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13123520 is an equidigital number, since it uses as much as digits as its factorization.

13123520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41028 (or 41018 counting only the distinct ones).

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

The square root of 13123520 is about 3622.6399213833. The cubic root of 13123520 is about 235.8758324132.

Adding to 13123520 its reverse (2532131), we get a palindrome (15655651).

The spelling of 13123520 in words is "thirteen million, one hundred twenty-three thousand, five hundred twenty".