13120506 has 48 divisors (see below), whose sum is σ = 32842368. Its totient is φ = 3708000.

The previous prime is 13120489. The next prime is 13120517. The reversal of 13120506 is 60502131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 12211 + ... + 13241.

It is an arithmetic number, because the mean of its divisors is an integer number (684216).

Almost surely, 2^13120506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13120506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16421184).

13120506 is an abundant number, since it is smaller than the sum of its proper divisors (19721862).

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

13120506 is a wasteful number, since it uses less digits than its factorization.

13120506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147 (or 1144 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 13120506 is about 3622.2239025218. The cubic root of 13120506 is about 235.8577736355.

Adding to 13120506 its reverse (60502131), we get a palindrome (73622637).

The spelling of 13120506 in words is "thirteen million, one hundred twenty thousand, five hundred six".